I didn't read every reply on all seven pages, but here's a possible repair that someone posted recently.
https://www.youtube.com/watch?v=BTmYwRAiT1s
I fixed my SNARK!
(I posted that link, but it's not the method I used.)
I took the broken SNARK. On the back, I inserted the curved extension in the SNARK. It barely held with 2 plastic teeth around it. I put the broken 3rd tooth and placed it carefully.
Used an elastic band. about 2 inches. 1/4 inch wide.
Wrapped it around the socket with 3 teeth...then around and around and around....
When I was finally done (4 attempts), it held the extension in place really well.
I put the mount on the other end. Carefully.
My SNARK is fixed!
I found this repair method when I googled "fix my broken SNARK tuner"
I'm grateful it worked.
(There are two other methods I considered....one--removing the extension completely; use gorilla glue to glue to the SNARK to the mount. Two...use the repair above. Use thin cord wrapped around and around and around the broken socket. Then use superglue or gorilla glue to hold that cord in place.)
I can do either of those if my repair doesn't last.
I broke my SNARK by leaving it loose in my gig bag; I don't have a pocket for stuff...and the bag doesn't have a lot of extra room.
My Uke is a KALA tenor travel uke. It has a lovely gig bag.
Dave