Originally Posted by
rccardr
Nutted ones no longer appear on the Tektro site, and like all things bike parts right now, all of the online suppliers seem to be out of stock.
There is a rare and esoteric 73mm replacement center bolt, but the only one I can find is in Germany & the cost with shipping is expensive for just a special bolt.
An alternative is to drill the frame for recessed nuts, but am hesitating to do that.
For now.
Shoot me the link to the German one. I'm in the EU right now. Depending on how the pandemic pans out I'm planning on being back in the States for the holidays, so if the one above doesn't work out I could potentially get it across the pond for you and then ship it from the States.