[arcticdude]

Airstreams use the same awning parts. I found much less expensive ZipDee parts at an Airstream dealer in North Carolina, iirc. I had to replace both heads on my bedroom slide topper when one broke. The other got heavily stressed from the twisting the awning tube did when the first head broke.
You might try your local Airstream dealer, if you have one. They should have this part, though the local one to me when mine broke did not have it.