hayward pool replacement pump

I have an A.O. Smith 2.0 HP pool pump Model # SP 1620Z1 with an attached sp 4020 strainer and impeller assembly with a motor lock ring.

I am looking to buy the whole assembly but I have had no luck finding these part numbers on line.

Thanks

Steve 508-335-4857

This model Hayward Northstar is actually no longer manufactured. Another model that has replaced it is the Hayward Tristar W3SP3220EE.