Thought I’d share this link to an eBay seller where I got my flightsuit from - Nomex, new old stock, correct type, and waaay cheap!
I asked him to send me pics of the tan ones as they look washed out in the photo (by the flash) and he obliged - I also wanted to check the velcro patches on the shoulder and upper breast were absent which they were - also the suit is a proper sandy tan colour.
Only just bought it so not received it yet, he seems like a nice seller though (so far)