Good aftermarket Rubber Gaskets/Grommets. Whats out there?

[some383]

I'm in the process of building a 1972 c10 and a 1968 c10 for a driver. Back in November 2019 I bought the 68 and it didn't have a fuel tank in the cab. So, I decided to use my near perfect 72 tank I had lying around because the 72 is a ways away from being on the road. So, I purchased the correct filler neck grommet from Lutty's Chevy on November 20th and had it installed on November 23rd as they are rather close to my house so shipping was super quick. Well this picture was taken Sunday, February 2nd and the grommet is already worse than the original one on my 1969 c10. I have a few original 1967-1970 fuel tank grommets that I can use for the 72 and I'll just order a 67-70 fuel tank for that truck.

Anyways, my purpose behind this thread, what aftermarket companies are selling quality rubber's for the 1967 to 1972 c10's. I mean it's one thing to change the grommet on the filler neck which we all know what is involved. However, I am not into replacing the window channels and wing window rubbers if they are going to dry rot in 2 months. Granted the 68 is sitting outside but this PA winter has been super mild and its only been 2 months? Just curious to what everyone has had good luck with and what has lasted? Thank You.