The set that I ordered from Moss Motors was not correct.
I looked everywhere for a universal bush in the correct dimensions but couldn't find anything.
I ended up ordering Energy Suspension part #9.8140G. $6 for two. They're correct in every dimension except width so I modified them by cutting about 1/8th of an inch off both ends and then scavenged the sleeve from the original. It was quite a bit of work to get things perfect but they came out better than I expected.
Unfortunately my OCD is going to force me to change the rest of them now, so I guess I've got my work cut out for me.
While searching, I did find this:
14-60216 - Spax Bushing, Fits G415, G448-S, G423S, G422
They're listed as compatible with my G415's so I assume in this case they are the correct part (and the picture shows them as OEM SPAX), but I wasn't going to pay $12x8 to refresh my whole rear suspension only to have the shocks go bad next year. Anyway, I looked for other sources of the part number shown in the picture above (SPX-0060216) and they might have the last 12 on earth as far as I can tell. If somebody only needed one or two it might be worth it to you to save your time modifying a universal bush.