I know of no commercial manufacturer that makes what you want, but then again I don't know everything
My thought would be to scratchbuild, cut ovals from clear thin plastic and make the gaskets from sports thread (the kind used to sew up sporting gear- it's made of plastic or kevlar and doesn't have "fur" on it).
Happy hunting!
The Dixie D Short Line "Lux Lucet In Tenebris Nihil Igitur Mors Est Ad Nos 2001"