63 Dart rear glass rubber seal

I am working on sourcing the final parts needed to reassemble my 63 dart after I get it painted and have a question.

When I got it the rear glass was smashed and the rear roof had been damaged. I have since gone through the process to repair the rear roof and reinstall rear brace and am pleased with the result.

I have also found a replacement glass for it. Had to pay up for it but as it's one year only I never had much choice (shipping was the killer).

Problem I have run into is that I don't have the rubber seal. After doing some research I can only find them through Steele rubber. Currently they are out of stock. I contacted them and while they say they will be making more, they don't have a timeline. Could be a few months, maybe more.

Does anyone know if anyone else makes this seal? I know steele has a reputation for top quality parts, but if it's going to keep me from getting the car finished this year I would install a different brand if available. I was hoping maybe one of the vendors might have one in stock but so far the couple I found that offered them had no stock (probably order direct from steel when order placed)

Thanks