YB oil pump - same as which pinto pump?

Guys,

Have pulled my 1000km old YB down to find bearings and pump are already worn quite badly - pump with significant scores in the rotor and housing - looks like I've had a bit of oil starvation at some point despite my winged and baffled sump :(

Anyway, need a new oil pump, and I remember mike Cogan saying on another forum that he just uses a pinto pump and gets the yb pump cover machined flat again (not sure if mike is on this forum).

Burtons have 3 pumps for pinto... Std, Hp and hv/Hp.

Obviously the pump will need to be the same height as the yb pump for the under piston oil feed to meet up with the lid of the pump.

Does anyone know which pump I need? Are they different heights? I would imagine the hv pump would need to be higher than a standard pump to create a larger rotor for the extra volume. Is the hv pump the same height as a yb pump?

Cheers
Ash