Good idea... I also have a hot glue gun... only my glue always ends up a bit sticky (both types) after it cools.
I will look for some that might cure better.
The good thing about hot glue is you can remove it if you mess up, you get one shot with epoxy. but the epoxy feels just like the button.
What are the chances we could get some extra buttons (left over stock) to work with?
Who should I send an E-mail to and ask?
I would happily pay for them.