hi ethanm90,
i suggest you check out group 4.591 in Master Parts Catalog 30 June 1952 at http://www.gmpartswiki.com/query
once you are satisfied with identifying the parts your vehicle needs search ebay and the wrecking yards, etc...

there are several intricate parts involved and making substitutes that you would be satisfied with may not be worth the effort.
i am certain that Turners auto wrecking in California would have these parts somewhere in their massive inventory.
-s