Have you called Walt Reynolds in Indianapolis? He's on the IN Regional Board and runs a restoration shop south of downtown. He does a lot of fabricating, including sidemount covers for some Packards. He might be persuaded to fabricate some for your Buick. Currently, he's putting new floors, trunk pan and rockers on my '41 Cadillac. He does very good work; he restored a Marmon that scored 100 points this January at the Winter Meet in Indy.