you tried a salvage yard Hollander interchange manual ?might get you in the right direction--give you something to match up--maybe take 2 to build one---Tom
back when i had the salvage yard--we sold a lot of tweeners--goes between the rea & the tra
had a good demand for Cadillac convertors--sold a good number of brake callaptors--
I could keep on going--Tom
Been there, done that--my 23 needed them also--don't remember how many pair i bought till i took things apart--had to unsnap the plug caps in both quarter panels, then i could see what they neededd to look like--Tom