Pivot Blocks?

[sime46]

Hi all. I'm new here so please be gentle. I have been runnin my ZX5 since they first became available and have tried all the different set-ups and love it to bits. Only prob I've found is how fragile the plastics seem to be. I've fitted the revised front end casings and alloy front pivot block and now its loads stronger, but I wondered if anyone knows of a company selling alloy rear pivot blocks, specifically the BR block. I've got through loads of these. The slightest impact and it pops. I've even broke one when I had too much grip on carpet and instead of grip rolling, it snapped the BR pivot. Other than that I find the buggy truly awesome, but this constant breakage is making me want to ditch it in favour of the new yokomo!!! Hope one of you guys can help. Many thanks, Sime.