Other brands of 28t idler gear to fit rat/monkey

[jpmatrix]

Been racing the Monkey on high grip astro with lots of jumps and its killing the idler gears.

What other brands are compatible and of a stronger material that can drop straight in the gearbox. I already have the hpi firestorm metal idler gears but they just eat the diff gear as they are narrower. I have set the slipper as loose as possible without the nut coming of the spur shaft.

Its not so much the money but more of a right pain in the arse to disassemble the diff case all the time.

Is there a 52t metal diff gear that can fit in there?