Detonator do a slide and barrel kit, but it costs a bomb (no pun intended), and you would probably have to import it from the Far East at even more expense.
Presumably you would then need some stronger internals - springs, nozzles, recoil rod and spring, etc. and I haven't seen anything available in that line.
Best to keep it as is and use it as intended with 144a. Even with a plastic slide and low power gas, It will outclass almost all metal guns with higher velocities. It will last much longer too.