Thanks billy.
I've looked at the diesel site piece, very nice! Actually placed an order there today.
I've heard a lot of things about the melling, I was under the impression there was a standard pump, and a high volume version. Apparently I was mistaken, as the part number I listed is the only replacement I could readily find, and that is described as a standard oem replacement, I.e. not high volume.
There was a thread discussing this, just haven't had time to find and reread it, lol.