Donald said
I assume you have a standard search set up on eBay?
That is where I got mine.
I've had an eBay search on looking for a /40 TROS mylar sheet for years, but so far
have not lucked onto any (by comparison /50 BCROS seems to be much more common).
Still looking, if anyone had a spare, would rather buy but I might be able to trade
something.
Steve.