https://smile.amazon.com/Rockville-RHTSC-Bookshelf-Speaker-Surround/dp/B07SQPDC2G/ref=sr_1_7?crid=1J5YBYLXDUNFP&dchild=1&keywords=speaker%2Bstands%2Bpair%2Bbookshelf&qid=1620348052&sprefix=speaker%2Bsta%2Caps%2C175&sr=8-7&th=1

These look sturdy, and there's no lip on the top plate so the speaker size shouldn't matter too much. Use some BluTac (or whatever color) under your speakers to isolate/stick them to the stands.

https://smile.amazon.com/Bostik-Mastic-Adhesive-approx-801103/dp/B00I42EOJE/ref=sr_1_2?crid=1614Q8K1NSYP7&dchild=1&keywords=blutac&qid=1620348503&sprefix=blutac%2Caps%2C165&sr=8-2&th=1