Finally got the circulation pump running. After going back and forth for a couple of days the MPPump distributor got the correct numbers and ordered the pump/motor assembly. By using UPS red tag service the building process was reduced from a two week lead time to three days with overnight shipping. Order placed Thursday and received pump this morning. It is installed and running. I have attached a photo showing new pump in place.
Still not sure how to get impeller off of old pump. MP Pumps is trying to figure out which puller I need.