The wheel supplied by Avery was 3M ID 61500122421. It is 3/4 face, 2" dia, 1/4" arbor hole. Unified, density 7, mineral A, Medium Grade
Zoro had some that were close 6 ? medium (gray) I think it is just a less dense wheel. Not sure about the mineral used and what is good for aluminum.
Edit: I found them on the 3M website and can be ordered in a case of 15.
Edit 2: Even more simple, here
is that same wheel at Cleaveland Tools.