Correct pistons for rpm heads 360?

Hi!

I'm trying to find hyperteutic pistons (because of my budget) that fits for rpm alu heads.
I'm looking for cr around 11-11.7
Quench would have to be between 0.04-0.036

KB offers -11,2 dome pistons hyperteutic and forged, but only forged ones fits with the rpm heads. Hyperteutic domes are designed for open chamber heads.

Flat top piston are +5cc, so i would have to mill the heads to 58cc combustion chamber to get 11.6cr and dynamic compression 8.6 with the cam i'm planning to use.

Do you guys know or have any recommendations for suitable pistons for these heads?