It was fine once the head came off, was fairly easy to drill out, certainly wasn't high tensile, they may have been replaced before.
Isuzu shop has found me the bearing complete inner and outer for about 70 a side
Going for another trip to the bolt shop to see what I can find.
I will get a picture of the problem soon and post it up... the rear bearing cage was dead, there was 7 bits of it missing and the 8 corresponding rollers were kinda flat.