we dont know of any double sided tape that is strong enough to hold these into place.
We use different glues depending on how damaged it is. because of the original way the mounts are fitted, with plastic lugs that press through the keyboard frame, the only way we have found we can get the alignment perfect is if we keep the majority of the plastic pegs in place. If they are even slightly misaligned, the key will not click properly, so alignment is paramount.
We use either Diall ‘Glue for Plastics’ or a dab of super glue to adhere it, ensuring to only put glue on the outer edges by the original pegs and not to near the butterfly clip mounts, or the metal spring dome in the middle.
I hope this helps.