Any know the compaq part number for a VRM for an ML350?

I have a ML350 (G1) which is currently running a single PIII 600
(133MHz FSB), and it uses a VRM with the part numbers
330638-001/329267-001. I'm planning to drop a pair of 933MHz PIIIs
into it but will need a pair of VRMs for the new processors? I believe
I need a pair 155681-001 but I cannot find a definitive answer as to
if this is the correct model.

Anyone have any idea of the part numbers I need?

Many Thanks,
Jason.