They are available in printed form, just do a search for forest dragon miniatures, there are several companies printing them. but just buy a resin printer and print your own, it will almost pay for the price of the printer just to print your own.
I have printed some of these, but I have printed mine in 15mm. Yes, 15mm for use in my 15mm army. I custom scale mine to as closely match the scale of the majority of the 15mm miniature I have, mostly Battle Valor and Demonworld, which in reality are closer to 18mm. When I scale mine, I print one or two and then compare to my metal minis, then maybe make them thinner/thicker and or shorter or taller, so like maybe 160% on the Z axes and 140% on the x,y axes, or what ever suits your needs.
Some of the mini's STL's designed for small scale miniature actually scale up better then trying to scale larger miniatures down to smaller scales, although it can be done.
Anyways, if you are going to print ( or have printed for you) and if you are not wedded to 10mm for Warmaster or what ever, why not print in 15mm if you have 15mm or 20 mm or 25mm (1:72) or 28mm to match what ever size fantasy army you already have.
While I have not played Warmaster ( have the rules) or even played Warhammer, ( maybe 2nd edition warhammer would be the edition for me if I played), why not just play Warmaster in what ever scale you have. From what I read, it would play just as well as 15mm as it would in 10mm, plus you can see them a little better, and the actual cost to print in 15mm isn't that much more then 10mm anyways. Unless you know a bunch of people who already have extensive 10mm armies painted up, just do them in the scale you actually like best. With a 3d printer of your own, you could print up a army of your own and print one for a gaming friend or two for little cost, as long as they paint them and dont make you paint them,
The forest dragon minis print up with zero problems for me, at any scale from 10mm to 28mm. So you could print up a 28mm army and a 10mm army if you wanted.
Buy the 3d printer ( a couple hundred dollars and 40 dollars worth of resin, and print your self up 2 or 3 different armies.
My self, I am printing for use with Battlesystem rules for my 15mm armies, and I have printed some in 28mm for use in d&d games. they dont only have to be printed for use in Warmaster. I single base my 15mm on washer and use movement trays (magnetic)and I can use them in anything I want.
The power of owning a 3d printer.
Mine is a Epax X1, but just about any of the popular printers will do just fine for less the cost of the Epax.
Printing armies is actually a much better use of a 3d printer then trying to print Character (PC's ) for role playing games. But printing for D&D encounter is great also. Send your characters against a group of 50 goblins ( which you have printed and painted) and its quite fun of in this case, skeletons and other undead. the cost of a 3d printed army is quite affordable.