6x6 maxx based crawler

[lincpimp]

First question for you gentlemen. I need to find a set of al rear bulkheads that are not machined in the area shown in the below pic.



I need it to be the same thickness as the rest of the bulk, with no material removed, because I want to cut it and tap threads so that the rear chassis can mount to it like the front one will. Plus I need to make the hole that the diff collar fits into to support the output pinion.

[lincpimp]

Ok, looked at the golden horizons and integy bulks and they do not look like they will work. I also had a look at the fastlane machine bulks and they look like they will, but I could do with a better pic of the inside... Any help would be greatly appreciated!