Sounds like you have see the semi-mythical "day star" that those of use who work in Silicon Valley "start ups" have heard rumor of.
There were a variety of oil filter housings that take different inserts, so the best bet would be to take your old insert to your favorite local "better auto supply store" and match it up.
If your car was equipped with the throw-away canister, then you should look into getting a housing type with replaceable inserts. They stopped making those disposable canisters about 5 years ago, so eBay, swap meets or antique auto specialty houses are your choice for those.
What I know about oil filters for old Plymouths is summarized at:
http://www.ply33.com/Parts/group10#10-C