New rectangular interior lens for cabinet lights

[Lothlorian]

I have all the orignal lens for the lights that are over the one bed, kitchen sink and a cabinet in the bedroom. They are the long rectangular lens that go to an 73 overlander. they are all in good shape except they have yellowed. I called Inland to buy some new plastic lens and I was told they are no longer available. Does anybody have a link to a site or a company where I could by replacement lens for my airstream. Or is there something else that would work?

Lothlorian

Brian