Have uploaded a (hopefully) complete manufacturers database for modern naval minis to the Modern Naval Gaming Facebook Group: link
Have copied it here for those who don't use Facebook.
List of Modern Naval Miniature Manufacturers.
Note: This list does not contain the dozens of different Shapeways naval stores, nor manufacturers of plastic model ships in various scales, these are primarily metal and resin gaming model manufacturers. Also does not include paper models that can be found on Wargames Vault.
Scale listed smallest to largest.
Multiple Scale:
MicroForm Models (assorted civilian ships in multiple scales):
link
1/6000 Scale
Figurehead:
US: link
UK: link
1/3000 Scale
Davco/Skytrex:
link
Denian Models (Possibly OOP?)
Navwar:
link
1/2400 Scale
Alnavco/Superior/Sea Battle
alnavco.com/warship.htm
CinC:
link
GHQ:
link
Panzerschiffe:
link
SeaWulf:
link
Viking Forge/Sea Battle:
link
1/1200-1/1250
Argos & Mountford:
alnavco.com/warship.htm
Navis-Neptun:
navis-neptun.de
1/700 Scale
PT Dockyard:
link
Seastrike:
link
Final note on aircraft, 1/1200 and 1/600 seem to be the most popular aircraft scales for modern naval (I use 1/1200 with 1/2400 ships myself). 1/2400 aircraft are available from GHQ. 1/1200 available from Magister Militum in the UK. 1/600 Oddzial Osmy available from Magister Militum in the UK and Pico Armor in the US. 1/600 is also produced by Tumbling Dice in the UK.
Dom's Decals in the UK has a nice range of decals for 1/600 and larger 1/1200 aircraft.