Where to get a front pump for a 42RH (A500)

Recheck the connector that faces up behind the shift linkage.If it is a 2 pin connector then the transmission has no lock up just overdrive.
If the connector is yellow it's a 2 pin.
If it has 3 pins then it has lock up and overdrive.
I can't say for sure,but i don't think they made a 42rh with no lock up function.