Bottom Plate for Boss Compact Guitar Effects Pedal (3 Pack) | Protective Cover for Boss Pedals | Secure Mounting to Pedalboards

I have these - they’re fairly thick and sturdy and do the job as advertised. Metal ones would obvious work too so it’s up to you. https://a.co/d/03QfN7Bo

I agree with flipping the boss part over. If that’s not a solution you like, I just got a few of these and they work well. https://a.co/d/07LqFKKs