If you get another clearsoft frame it will just crack again. Clear/translucent plastic is just too brittle. Full black plastic is far more durable.
I don't recommend sinking further cash into a WE cansoft. Play it until it dies and then buy a better pistol. I speak from experience - I have two WE dragons, one is sitting in a ziploc bag in pieces and the other has a badly cracked frame. I have since moved on to kwa.