Looked into the Greenfield stabilizer SKS2. Actually, have package in front of me. But the mounting brackets are not at all designed to “embrace” larger diameter tubes; it would just squeeze aluminum tubes flat (or not stay attached to the bike for long). Amazon.com says the SKS2 is not designed for larger stays. Wonder why the LBS would sell it to me with the bike in front of them? So any further suggestions are most welcome.
Fat alloy stays are going to be a problem. Consider a center stand behind the bottom bracket.
https://www.amazon.com/dp/B074CHPT5J