I didn't look for the gasket anywhere else, so sorry can't help you there. Andy can get almost anything, I'd say give him a try. I didn't see it on his website, however. An Airstream dealer should be able to order it for you. Just give them the part # I cited.
The Airstream Store is the one which is set up in a tent at the International Rally every year. From what I can tell, they simply move everything they have for sale at the factory "Wally Byam Store" out to the rally! Sometimes they offer good deals on closeouts and such. They have practically anything you can think of to use on your Airstream.
I didn't feel it was important to terminate the gasket in anyway. The original was not done that way and it obviously lasted quite awhile! I started in the upper left hand side of the door frame and ended up in the same place and then cut the gasket to fit exactly. It's hard to tell from the picture, but the gasket contains a metal insert which snaps on and grips the exposed aluminum edge very
tightly. I had to lube it up with silicone spray or it would not go on at all. That's how tight it is.
I compared the dimensions of the new gasket to what was already on there and it was identical
This gasket is absolutely not
the same as on my '72!!! I used the '72 for an example to contrast the different approach they used back then. On my '72 there is only ONE type of gasket for the entire coach. It's bi-level looking like this /__/ on edge where outer side is longer than the inner side. (Look at Andy's Pic here
). You probably have this type of gasket around your windows if you have a 70's trailer. My '72 uses this on all the windows, the main door and the compartment doors. You must remove the old gasket, work to get the petrified glue off, then apply new 3M glue to the gasket and the door once again. Let that dry, then apply more new glue to the gasket and stick it on in the right place. The other difference is this gasket goes on the door frame
and on my '72 to the glue on gasket is always applied to the door itself. Trust me, it's completely different. This one is only for the compartment doors and I'm uncertain which years, but if your doors look like the ones in the pictures above, then it's probably the right one! The main door has another type and the windows have yet a different type. I hope I haven't confused you!