You used to be able to by the german airforce flying suits which were quite smart, they came in different colours such as green, black or orange etc...but now that I think back I'm not sure if they were the nomex flame retardent type or not.
I also used to fly at weekends teaching cadets and we were all issued with full RAF flying kit, felt bit silly at first but then we all looked the same and it did look smart and offered good protection....mind you it was gliders and they tend not to burn....
