Bought it from Robey's last week before removing my old pump, only to reveal I already had one. DOH!
Anyway, it's a remanufactured original by these people in the US:
http://www.cardone.com/English/club/mem ... NUM=58-173
No gasket included as I had to use it to put the old pump back on. Will fit the 383 engine, might fit the 440 but don't quote me on it, please check first.
Was xxx£70 from Robey's, looking for xxx£60 + postage. Collection a possibility.