Does anyone have a link to a rear window seal for a factory sliding rear window? Alli can find are ones for a solid/aftermarket slider. From what I read the channel is smaller on that seal and it will not work.

 

I'd try the dealer and even if it is NLA get a part number. Steel Rubber does a lot of different windows. It's probably best to call them since I tried for a 95 dak on their site and got nothing.
Precision Restoration Parts may make one too. https://www.prp.com/restoration

 

They are different seals. Also the rear slider seals have different part number depending on year. Anyhow here are the part numbers. Looks like gonna be very difficult to find