stampede diff gears

[sshake1]

Does anyone know of a way i could get my hands on a set of robinson racing internal diff gears for a stampede tranny? I know they stopped making them quite a while ago. I just got a mamba max 5700 and im runnin it on 3s lipo. It worked for a couple days, about 4-5 batteries, then one unlucky pull of the throttle and it shattered the internal gears. I dont want to just keep replacing them all the time but i dont think i have any other choice.