if you find one let me know. i had 2 bsquares that clamp onto barrel and i ended up throwing them out. on my gp i got one of the best no drill and tap mounts i ever had.
the mount uses the rear sight hole and a replacement for the front sight is installed,
the new blade has a hole for the front screw to pss thru and screws into the front part of the mount. then there are about 3 screws that tightened the hole package down.
i've shot a bunch of top end loads and the mount hasn't budged.
unforunately, the company is not open for business anymore,but i think bsquare is producing something similar. good luck dan