RetraxONE XR install - missing gasket help

Did a quick search and came up empty.

The Retrax kit I received is missing the foam gasket tape required for the 2nd gen 6ft install. Called Retrax to ask for the specs on the gasket tape so I could pick it up from the hardware store. Customer service wouldn't/couldn't share that info but they shipped out the gasket VERY quickly.... except it was the wrong part. They sent the foam end caps for the 3rd gen....

I need to get this thing installed before the weekend so I'm hoping some 2nd gen frens can help confirm the dimensions of the foam gasket included in their kit. I did pickup some 3/4" wide x 1/2" tall closed cell PVC foam tape (M&D part #02311). Will need to double stack it to fill the 3/4" gap between the bulkhead rail and the factory side rails but this should compress enough to provide a decent seal. This should work but want to run it by y'all first.

Also - Big shout out to @Santana@Realtruck for the hookup and awesome service. The missing part had nothing to do with Realtruck but their assistance figuring this out has been phenomenal...unfortunately Retrax hasn't been helpful.