Apparently these were available when the game was manufactured by Fantasy Flight Games, but when Ares took over they decided to make different models of aircraft, and a vacuum has been left now that the older models are out of production.
I did a bit of research and found the excellent resin models by Armaments in Miniature.
Shipping from the USA to the UK was pretty much a flat rate, so I ordered what I wanted and a few extra that I'll sell on (hopefully!)
Decals are from Mehusla on eBay and are really superb quality- easy to apply and they really 'finish' the models.
I had to hand paint some of the numerals by hand- not east at this scale!
All are AIM model apart from the JU52 and JU88 which are Zvezda plastic kits. Just wish Zvezda made more in 1/200.