[wPine]

There are reproductions made and sold on ebay. I cannot vouch for the quality, but AFAIK they are the only available option.

SET of 4 Isuzu Trooper / Bighorn 5D Model (1988-1991) Door Rubber Seal | eBay

 

[lowzone]

think he needs the gasket for the vent window.

 

[Wmamula04]

Shop Genuine Isuzu Parts & Accessories | Isuzu Parts Center

This might have what your looking for

 

[Shawn Anthony]

I have reproduction window gaskets in- stock. $65 per window

 

[Lyte]

There are reproductions made and sold on ebay. I cannot vouch for the quality, but AFAIK they are the only available option.

SET of 4 Isuzu Trooper / Bighorn 5D Model (1988-1991) Door Rubber Seal | eBay

Actually this one worked on my trooper nicely just had to get the clips repositioned then using heat and lol sadly the tape that is on it was crappy so I used some make a gasket to hold it on it was all I had. Just condition the weather strip on all doors, windows, including windshield with a silicone (not just any type will work) and you will never have to replace them again.

 

[Frddy330]

I've got new factory sail window seals. Just send me a pm.