4d9r - you won't find info that picky - there were about 196,000 trucks produced of under 6000 GVW in 59, so I'd bet there's at least hundreds of'em around - the big window, deluxe trim, fleetside trim were xtra cost options, w/ the fleetside trim being uncommon, on the least common bed - as far as how many left? not a lot, but quite a few!

there's no 'registry' of old Chev trucks, especially the one's behind the barns - they continue to sprout up regularly
Bill