The memory foam silicon tip replacements are the only ones that have worked for me. I use complyfoam earbud tips now because the cheap foam eartips broke when the inner silicone sleeve separated from the foam.

I have Anker Space A40 wireless earbuds which has silicon tips. They came with 3 sizes and none of them fit and didn’t fall out. I bough a set of 6 different sizes of silicone tips and they still fell out. only the foam version worked for me so they might be worth a try if you already have a silicone tipped earbuds.