I happened across a photo of the Trillium
I was talking about (with the replacement adhesive molding) while searching something else, so I thought I would post a photo. It was previously owned by forum member Charlie C - I looked at it when a subsequent owner had it for sale
(and I believe another forum member ended up buying it).
Anyway, as I understand it, Charlie C removed the original riveted on belly band, sealed the holes (not sure if he removed the steel plates or not) and then applied this adhesive molding, which was originally meant for... a Chevy pickup or the like.