IH TD 20B with DT-429 coolant pump source??

I have an old IH TD20B with the DT-429 engine which I first joined the site for which has a failing coolant pump. The IH part number is 612106C91 or 92 but is no longer available through them as they used the engine in a farm tractor. I called the Dallas Komatsu dealer and they say it isn't available through them either. They gave me a number for an 'Advanced Machinery Parts' in Georgia but it was too late today to call them. I don't want to go used if I don't have. Anyone here maybe have one on a shelf or know of a source?
This is yet another reason to steer clear of the old abandoned brand machines!

IH TD 20B with DT-429 coolant pump source??