Originally Posted by unworthy1

IIRC the originals were a molded rubber bit (Gipiemme made?) that snapped into the oval hole. I suppose you could find a round rubber grommet and squish it to fit the oval. The center hole would become more of a slit than a hole, but might grip the housing OK or you could help the grip with some silicone glue. Your idea of fabricating oval AL plates sounds slicker, but any angle you drill thu really thin stock won't offer much "angled" surface for the housing. I wonder if you could take it farther (and more complicated) by bending a piece of it inward to create an angled tab, drill a hole in that tab for a step-down ferrule...glue everything in place with silicone sealant...if I keep thinking I might have to draw a diagram!