Thanks again to all of you for your input - I had a reply from both sellers currently listing these pumps, both said:
"The gears are 14.5mm and they're made from sintered steel"
So I guess these pumps might be marginally better than an N1 pump, but still in my books not an option.
Nitto - thanks so much for your in-depth insight - the final nail in the coffin really. Again, I would LOVE to get my hands on one of your pumps, but it is simply out of my price range - I have an RB30DET making around the 300kw mark, fairly mild and with the whole motor tallied up is only worth around 2K all up (std. internals etc.) - I just cannot justify (let alone afford) spending that much money.
I will be getting some billet gears for my N1 pump, as that is MY best option - everyone needs to weigh up all their options, and that is best for me. - and on that note - Nitto, do you sell billet gears for the N1 pump?
So in conclusion for these pumps - exactly what they appear to be - cheap.