I completely see the "need" to have a correct looking filter on an engine for showing purposes even if it means paying over $30.00 for it.
That said I still believe that (at least the '64.5s-'66s) had the filter painted along with the block at the factory, I would think the paint coverage wouldn't have been all that good as after all the filter was installed when everything was painted.
I personally think doing all the work to remove the outer cover from a reproduction filter is nonsense and we just need to find the source of the reproduction double crimp filters and buy them in bulk (blank) probably for under $5.00 each then paint block color.
I remember many years ago some of the private-label (off brands) of filters were double crimp and I really never paid any attention to them.
I think we all should start looking in odd places for these double crimp filters in older hometown type parts stores, western auto, pep boys, tractor supply, places like that-we might be surprised-after all SOMEONE IS making these filters for the supplier of the reproduction ones that are on the market.AND BTW the one pictured over on the VMF I believe is one of the currant $30.00 reproduction units that someone bought and painted and had a stamp made for and sold it for an incredible price on Ebay about 2 years ago AS AN ORIGINAL!!!