Just to stick my spoke in, I've just bought a Gavin Militaria tunic, and I'm quite impressed with the quality. Much better than Spearhead and some ot...

Correct, although not worn by ground troops such as Fallschirmjäger, Luftwaffe Feld Divison, etc.

Well, this is what a Fliegerbluse looks like. Quite different from what you bought.

You can also pick up cheap collarless shirts off ebay.

Full Heer outfit with greatcoat and 60cm lid available You could split that as a tunic for one and a greatcoat for another!