Some of the after market company don't offer that tight clearance 4032 alloy tsk Ross being one of them shruggy
JE,SRP and Diamond as well as probably several other do offer any of their custom piston in either alloy work
JE doesn't own that alloy, the foundries make the piston blanks and the piston makers finish them shruggy

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)