Just as an update. I order the part PM03015 (as I attached earlier) from my dealer. They arrived and are exactly like those pictured in the TSC post, although only one per pack with one roll pin.
So one bushing (with the big end) including a roll pin for $12.95 canadian or $9.95 from US dealers. That equates to about $25 per pair in CDA and 20 per pair in the US. Equal to TSC in the US, I suppose. And waaaaaaaaaay less than the quoted $130 per set for the other part listed by the canadian dealer!!
I can't confirm yet how well they fit or if I need a cat 1 to 2 bushing between the implement pin and the new bushing part. I assume I do, but I bought those at TSC for $3-5, so I'm OK there.