A quick Google search showed only 1 in stock and that's with MHzOutdoor.com in Italy, but they ship to the US.
The Baader Prism1 diagonal comes with a helical focuser eyepiece clamp, not the ClickLock. I use one and it's nice for fine-tuning focus if your OTA doesn't have a microfocuser.
If you want the 1-1/4 ClickLock you probably need to buy the three pieces separately:
- T2-01C diagonal body Baader #2456005
- T2-14, 1-1/4 T2 nosepiece Baader #2458105
- T2-08, 1-1/4 ClickLock eyepiece clamp, Baader #245100
In my T2 diagonals, rather than using the 1-1/4 T2 nosepiece, I use the 2" T2 nosepiece, but still use the 1-1/4 eyepiece clamp. (ClickLock or Helical). That eliminates the need for using a 2 x 1-1/4 reducer when using only 1-1/4 eyepieces in a 2" focuser. The older T2 2" nosepiece is T2-16, Baader #2408150. The newest one is T2-16A, Baader #2458130. I prefer the newer version with the small safety kerfs rather then the undercut on the older version.
All pieces are available at AgenaAstro and other retailers. The Baader 7-digit number is Baader's official number. The T2-XX is a designation used pretty much only in NA I was told. You can usually search by both.