Anyone out there still looking for overalls/balaclavas, and fireproof gloves, need look no further than McGill Motorsport in Kirkcaldy, Fife, Scotland. Tel: 01592 654136.
Rachel McGill proved to be most helpful, and price wise, I don't feel that I was ripped off.
Worth a try if you're not yet fixed up.
I have a nice big, chunky, set of SFI 3-2A/5 overalls to wrap around my fuel filler!