Some recordings which include quite authentic period military music (this is by no way an exhaustive list, more pieces are dispersed over various locations):
Prussian military music up to 1806:
amazon.com/Altpreu%C3%9Fische-Milit%C3%A4rmusik/dp/B00EKVZVP4/ref=sr_1_1?ie=UTF8&qid=1466190571&sr=8-1&keywords=altpreussische+Milit%C3%A4rmusik
After 1806, Prussian military music virtually ceased to exist. It was so much depleted that Prussia had to fall back on the repertoire of the Russian Imperial Guard bands whose instructor Anton Doerfeldt was an eminent composer and arranger of military music and the editor of the so called Imperial Russian Collection of Army Marches (from 1809/1810 on) which served as a basis for the Royal Prussian Collection of Army Marches (from 1817 on).
Many, if not most, pieces of the Doerfeldt collection can be heard in their original early 19th century version on youtube. See members "PetrovFed"; example:
youtube.com/watch?v=67ZGZ1yrUWg&feature=related
…,"duxdemontis98"; example:
youtube.com/watch?v=KZLqg66xOTQ
…, or "Kanaal van MrLeoBelgicus"; example:
youtube.com/watch?v=PbESOQuan4U&feature=related
(despite Frederick the Great's effigy, this is a Russian march!)
Most have been recorded by Stadtmusik Wien, Director Gustav Fischer, and a few by Heeresmusikkorps 6, Director Johannes Schade.
The Stadtmusik Wien has also recorded a few Austrian marches of the Napoleonic era, but many are arrangements made from piano versions. Other contemporary marches by Joseph and Michael Haydn, Beethoven or Krommer can be found e.g. here:
amazon.com/Im-Gleichschritt-Fortschritt-Marsch-Bla/dp/B005M8EUWE/ref=tmm_acd_swatch_0?_encoding=UTF8&qid=1466194171&sr=1-2-fkmr0
amazon.com/Beethoven-Harmoniemusik-Zefiro/dp/B000RT39IE/ref=sr_1_1?s=music&ie=UTF8&qid=1466194324&sr=1-1&keywords=zefiro+beethoven
amazon.com/Krommer-Partitas-Op-45-Marches/dp/B00005B1D4/ref=sr_1_sc_1?s=music&ie=UTF8&qid=1466194396&sr=1-1-spell&keywords=krommer+marsch
A recent British late 18th century military music CD:
amazon.com/Music-Christopher-Ely-1785-1794/dp/B00149543O/ref=tmm_acd_swatch_0?_encoding=UTF8&qid=1466191887&sr=8-1
Digital music:
amazon.com/Royal-Heritage-Collection-Elegance-1795-1863/dp/B006LEF3A6/ref=sr_1_1?s=dmusic&ie=UTF8&qid=1466192190&sr=1-1-mp3-albums-bar-strip-0&keywords=coldstream+band+age+of+elegance
amazon.co.uk/Military-Stereo-Version-Trevor-Ensemble/dp/B00I1HBELI/ref=sr_1_1?s=dmusic&ie=UTF8&qid=1466192245&sr=1-1-mp3-albums-bar-strip-0&keywords=trevor+sharpe
amazon.com/Sounds-Military-Vol-1-1600-1750/dp/B0051CBOZW/ref=sr_1_1?s=dmusic&ie=UTF8&qid=1466189264&sr=1-1-mp3-albums-bar-strip-0&keywords=band+of+the+royal+military+school
amazon.com/Sounds-Military-Vol-2-1750-1790/dp/B0051CBJGG/ref=sr_1_5?s=dmusic&ie=UTF8&qid=1466189246&sr=1-5-mp3-albums-bar-strip-0&keywords=band+of+the+royal+military+school
Bavarian late 18th – early 19th century military music has never been available on CD, but only on an LP called "Unter Bayerns Rautenbanner":
amazon.de/Rautenbanner-Regimentsstreiche-Truppenzeremoniell-Jahrhunderts-Originalbesetzungen/dp/B006YN97EM/ref=sr_1_22?ie=UTF8&qid=1466192675&sr=8-22&keywords=unter+bayerns+rautenbanner
An identically named CD available as a download has nothing to do with the LP and does not include any authentic Napoleonic era military music. Don't waste your money on that download but try youtube. To begin with, "Figatter 1791" (Assembly 1791):
youtube.com/watch?v=A7cPI8WuFT4
Find more yourself. The original late 18th and early 19th century pieces were recorded by the Musikkorps des Grenzschutzkommandos Süd, München, Director Josef Pollinger.
As far as I know, no Dutch band has ever released an LP or CD containing late 18th and early 19th century Dutch marches played according to the original scores. That's all the more surprising as the Dutch have a vibrant military music tradition but, unfortunately, only as far as modern brass band music is concerned.