David,
I would guess, from all the facts I have, all but 20 or so of the 562 1965 Shelby GT350's have been accounted for. Of those, I would guess around 250 or so have no major past issues, ie. rust, rebody, accidents, matching #'s, original parts, etc. IMHO the early 66 Shelbys will be the ones to buy if you can't afford a 65 because of the rarity and unique (left over 65) history.
Look for CSX2252 at SAAC-30 in Fontana.
Bill