gen3performance1

does anyone know where i can buy a new insert for my rk sport aluminum flywheel?the part that is steel and bolts to the flywheel for the clutch disc to contact.i looked on their web site and cant find it.did i just look in the wrong place?i've looked at several manufactures web sites for these pieces because it seems all aluminum flywheels have this but i have not found one yet.i guess they want you to buy a new flywheel everytime you change clutches.if thats the case ill go back to steel before i'm taking advantage of like that.thanks for any info.