2ct 3" width Rubber Compression Boots (10ft Length)

3 Inch Wide, 10 Foot Length Rubber Compression Boot. Sized for a 3rd gen Tacoma.

Connects the truck cap to the cab of the truck. This boot is 3 inches wide but spans a gap that is 2 1/2 inches or less. To install simply push it on to the truck caps fiberglass edge at the bottom , continue around and trim it to fit. When you reinstall the truck cap the boot will contact against the back of the truck cab.

https://www.custompickup.com/shop/index.php?l=product_detail&p=3335

Doesn't fit my 100XR, but it might fit your truck better. I bought from 2 different vendors thinking they are they were different, but it turns out one of the two sites misrepresented the measurements. They're the same product.

Asking $65 ($50 + shipping). That's half price.