Just buy a new d, and a REAL turbo kit, complete with a turbo timer, intercooler (bigger), and a better fuel system or poormans hondata... Definately invest in an EGT gauge if you are going to Run the existing setup.... but personally, I think it's your turbo. If it's always blowing hot your going to keep breaking shit.

Instead of a new setup you could get CMR to rebuild what you got, or at least check it out...

Just my $.02