Good to support a fellow Hamber. If that doesn't work out, you might check these guys as they still seem to have a lot of Offy stuff. https://secure.pawengineparts.com/shoppingcart/showpage.cfm?catid=739
Dan's the man, His grandfather was a designer/engineer for Offy. Dan is a hot rod guy and has a vast knowledge of Offy parts.
Can't help you with the parts but i'll sell you a shirt http://www.jalopyjournal.com/forum/showthread.php?t=359447
Dan is the man!! Just got some Valve Covers for my Olds... And the best thing: you also get the HAMB Discount!!! Of course, after you joined the Alliance ;-)