Pintle caps for the 370cc injectors (look here if you need them)
 

After much research I have found a place to order replacement pintle caps and new O-rings for the 370cc nissan injectors that are needed to run ECUTune 2V7.

I orderd them from http://www.accuratediesel.com/. I emailed Tim(tim@accuratediesel.com) and he set me up.
It was like $33.00 for 8 pintle caps and 8 sets of the O-Rings shipped.