Here's an option...an old-school one, and it may not be what you want to do, but it's worked for 45 years.
I have a 1958 NCO (No. 357). I'm thinking that the seals were the original ones as they were still attached, but I can't say for sure. The seals looked like they were made from some kind of rubberized material on the inside with a cloth overlay, and they were sliced open so that the open side faced the exterior where it was closed tight by the aluminum trim. Hmmm. I researched the internet for weeks, trying to find a 1 3/8" cloth wrapped rubber strip, or whatever.... I had never heard the word, 'pirelli', so I didn't google that term. Upon further inspection of those old seals, it dawned on me that it looked like a fire hose sliced right down the middle lengthwise. Here's what I stumbled upon in May 2023 for $20 out the door:
https://www.repurpos...-free-shipping/
(Now, you have to order two ($40 total), or you can buy 1 hose for $40 on eBay---same seller)
Dimensions: Length: 95′ | Diameter: 1.5″ | Hose Width When Flat: 2-3/4″ +/-
So, I laid the hose flat and sliced it down the middle to create 2 x 1.375" wide seals. I need approx 50' to place seals all the way around both top & bottom so only used 25' of the 95' I received...because I had sliced them in half lengthwise. I have enough left over for two more NCO jobs. If anybody is interested, shoot me a message, pay for the shipping cost & it's yours! The site now requires a minimum order of two 95' hoses ($40), but whatcha gonna do with the extra 165' left over?
P.S. The reason I'm inclined to think that these were the original seals is because this 1958 NCO was in exceptional condition. Minor wood rot along upper driver-side wall & curved bulkhead, nothing that needed some dumbass to tear off the skins & rebuild the entire upper driver-side wall & bulkhead. Guess who's a dumbass? But, anyway, as I was stuck on stupid...I was able to inspect the skeleton, and there was no other serious water damage. Whomever had this baby, used it very little & kept her covered. All original & stock appliances. Doesn't look like anybody did any work on her, but who knows. I bought her for $250 from a family who said their father bought it new.