Looking for a Compact boost gauge need some options.

I wanted the Blitz FATT but the boost reading isn't in PSI, i don't mind a gauge that reads in BAR but i don't want to get the calculator to do conversions.

Besides the Blitz i didn't find any other ones.

 

i had the most compact boost gauge ever. It started as a joke but i kind of liked it so i kept it. It was smaller than a quarter, i got it at autozone. i dont remember what its real intended purpose was for. Anyway it read up to 15 psi.