Wow, that really is a pisser.
I’d be raging about that to this day if that was my Hei Hei,
I’ve got a USE on my Kona Kapu, with a shim let hope it doesn’t go the same was as yours.
What did you do with the frame and was there no way of repairing it?
Also you don’t have a spare bung for a Velocity stem do you I’m missing mine, I did ask on Retrobike a while ago but was met by a deafening wall of silence.