Chaps,
Be wary of using Mk14 (or any RAF flying suit for that matter) and "Nomex" in the same sentence, it might give a false sense of security. Once they've been in the washing machine a few times they aint Nomex any more - unless you get them reproofed. I wear one every day and mine certainly hasn't been for a few years.
For my civilian flying suit I used Martaviation and got a brand spanking NATO flying suit (like USAF but with epaulettes) for around £80. It fits a lot better (I'm 6'2") and is harder wearing. And I sometimes wear it for work and nobody notices.
Reichman