I was not successfull to find one but since my primary objective was to use it to lock a Rohloff 14 gears, I made an adaptor that will do the job (photos attached).
I am evaluating the feasability to install a Gates CenteTrack Carbon Belt with a Rohloff Speedhub; so it will be a good design to introduce the belt...
I have 2 Merlin Fat Beat. I took 2 pictures of the old defect part and the new desing. You can see in the picture the crack on top of the part. I hope it can help.
I am looking for two Merlin rear disc brake adaptors like the attached picture. I have two Merlin Fatbeat. Those adaptors where produce by Merlin and Litespeed and seem to be made of aluminum. I am not sure if there was titanium versions wich I would prefer. They had Merlin logo engraved.