Spitfire mkxvie 1/48 or MK16 Airfix

Hi Boonerball, you don't say where you are based, so here is a few generic choices.

There are a few mfrs that do

Search ebay for: Eduard 1/48 seatbelts, you are looking for their RAF late pattern colour etch set.

or HGW: search for: HGW 1/48 Micro Textile Seatbelt Set 148005 Spitfire

Other search engines & auction sites are available, or try Hannants.co.uk

ditto search for  Eduard or Montex spitfire paint masks, most will be for wheels or canopies,

but I believe someone has produced camo masks, but if you search the forums, you will find tutorials on how to:

These afre not etched, but i am sure they will do you nicely.

www.hannants.co.uk/.../HGW148005

I assume these will copy the marks of spit you have.