Blake got it right, that's where I get my Zaino from!
I went to Cmax today (they moved, they are now on Dundas & Wharton Way (near Dixie) and they didn't have any #21 unfortunately. They did have #80 though, so I bought that instead, to get a head start on working on my front end before my UDM arrives (I'm probably going to order it next week) They say #80 works by hand and orbital buffer too, so I'm trying both of those methods for now, not sure which works better though. My new plan now, once my UDM arrives, is to use #83, along with a yellow LC pad, then follow it up with #80 with an orange pad, and if need be I could do a third step of #9 with a white pad (although I think that step might be overkill) Then I'll finish it up with #21.
I also went to Carquest, a couple of different NAPAs (Cmax is a part of the second NAPA I went to) and PartSource today. PartSource cannot get #21 at all. Carquest told me they had some in their warehouse, but I couldn't get it until Tuesday. I'll just order the #21 and #83 with my UDM order from EShine.ca