Can't help with the bra situation, but love the idea of "extensive road trips" in a 544. Just hope there not in the south, that could get uncomfortably hot.

This may be off-base, but didn't someone used to sell some kind if clear thin plastic - kind of like a static type of bumper sticker material. It could be cut to fit and was clear. For some reason I'm thinking it was IPD, but not sure and it was many years ago.

Still, maybe you could find something like that from a graphics / sign shop. I think that's how they do a lot of lettering and designs for commercial vehicles now.