i am canvassing interest to present to a potential manufacturer to see that this is viable. RAF reenacting is big and yet shirts are not to be had. you can get any type of german shirt and loads of german militaria that didnt even exist..
a basic pullover collarless design in a blue grey fil a fil fabric, which is easily available, has to be achievable. problem is I think we would need to talk in the hundreds to make it worthwhile for someone. I am sure a chinese or other far east manufacturer could do this however.