I tried all of these.
With the SpinFits specifically, those ones I cut just above the pink plastic part to glue into the Bose StayHear eartips. This works very well if you can glue it properly but since there really isn't any consistent or real way to do it, doing it properly is a crapshoot. Again, my left eartip is perfect and I've never had an issue. The right eartip is the one I didn't get quite right.
https://www.amazon.com/gp/product/B08BR677ND/ref=ppx_yo_dt_b_asin_title_o06_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B01B77ZBZI/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B08KSH3721/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B002DY92UA/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B00JSLXNOC/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B07PJNRGNH/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1
https://www.amazon.com/gp/product/B00JSLXOLE/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
These are the tips I'm using https://www.amazon.com/dp/B07PJNRGNH/ref=cm_sw_r_cp_apa_fabc_JA8M7P6E80G1ZDXFC667?_encoding=UTF8&psc=1
CP360 M or Larger may not fit in buds2 case
https://www.reddit.com/r/galaxybuds/comments/pbfper/psa_spinfit_cp360_large_tips_prevent_the_buds2/
Can I buy these from Amazon and return them after I've used them if they don't fit right?
https://smile.amazon.com/SpinFit-CP360-Patented-Silicone-Replacement/dp/B07PJNRGNH/
I really want to keep my buds2, but they just don't stay in well enough with the stock tips.
I bought these recently as a replacement for a lost ticpod tip also, and something surprising happened for me. The sound quality was significantly better with these, and the noise cancellation was better too. They do stick out a little, keeping the case from closing completely, but it closes enough to still indicate the charge status (the lights that come on when you open the case). Worth a shot at least.
https://www.amazon.com/gp/product/B07PJNRGNH/ref=ppx_yo_dt_b_asin_title_o09_s00?ie=UTF8&psc=1