Hi Pete,
Thanks for the comment. The Allied stars are all from I-94s US-109 sheet.
In regards ranges, I use the following: I-94s Beacon and Scale Specialities ranges, Dom's Decals (although I don't think that they're available any longer), Flight Decks Decals (both direct from Dan and via Baccus in the UK), GHQ (mostly the UK Geometric insignia sheet - although I'll probably end up replacing them with those from FDD), and 1/350th and 1/700th sheets from Trumpeter Models range of aircraft for their aircraft carriers.
Butler's Printed Models do a small range of decals too, but I've yet to try them.
I've still got some old decals from Trafalgar Models (back in the day they were pretty much all that was available), a few rub down decals for WWII Belgium roundels, some rub down Letraset sheets (letters and numbers - mostly too large for 1/300th / 1/285th), and some other odds & sods that come from here and there. I did get a sheet years ago but I don't remember who published it (IIRC though they discountinued it at some point) that had a bunch of Eastern Front national insignia (Hungary, Romania, Poland etc. as well as pre / early war Yugoslavia).
I've also taken decals from old model kits - purely for things like stripes or bands of a single colour.
EDIT
A quick photo of the decal collection.
