Rigmaster radiator fan motor

Information on part numbers for those that need to repalce the electric radiator fan motor on a rigmaster MTS-t4-Lg200 model.
Last year my radiator fan motor quit working and had to be replaced.
Needed the fan motor quick and did not have time to order OTC 3916397 so after breaking out the tools i found myself dashing off to the local auto store with motor in hand. Parts guy was a pro, looked at it and pulled out part number PM3900 or 655-1815.... looked different but mounting holes matched the shroud, and fan blade fit on there with no issues.
A year later the motor begins to make noise and whine. Back in there again pulling it out- this time removed the top raidiator coolant hose making removal (from left side of the apu engine when loooking at it) and especially reinstallation of the whole fan assembly a breeze.... somewhat.
Did some research this time and found that in addition to part number PM3777 being a suitable replacement, a toyota corolla 93-97 radiator fan assembly # 620-500 or Fa70070 has a very similar to original looking electric motor and for the extra couple of bucks more you you pay for this item, you also get a new fan blade that fits fine as it comes as the whole fan assembly.
Hope this helps those looking to replace their fan motors on said model Rigmaster apu but dont have time to order the original motor from online rigmaster vendors.