Not really, you could counter sink the mounts, bore through into the top of the cylinder, tap out the hole, de-burr and polish the cylinder internal, Cut the screws down so they dont poke through into the cylinder and interfere with the piston stroke, locktite and the jobs a good un.
Only one M4 screw per mount would be needed.
Getting it machined would be a better option and may only cost £20 cash plus a reblue