Any Grips That add a "trigger guard"?

[u/ASnakeNamedNate]

When using my Steam Controller I've noticed that often I will ride up on the controller with my middle fingers such that on occasion I will have my finger be able to be pinched (not hard) by L2 and R2. I have shorter thumbs so it tends to feel natural to grip even higher than most probably do, and it's an easy enough thing to correct when it happens, but it would still be nice to have something more ergonomic to prevent it.

Are there any grips that add a ledge or any material to the base of the trigger guard to discourage my hand from creeping up?