Hi
the pumps aren't too bad to do, we fitted one recently, the owner got a recon one from ebay i think, it certainly worked okay, we also replace the tank & filler neck, i think the pump was about £1400
when we checked the timing we initially thought it was a tooth out, but because it's on a skewed split gear it was correct

i think it came from here

http://www.ebay.co.uk/itm/Reconditioned-Diesel-Pump-109144-3062-ME190711-ME204338-4m41-Shogun-3-2DiD-/261887566690?pt=LH_DefaultDomain_3&hash=item3cf9b72362

Steve