I need duetz FL 511 piston,piston pin,clip,piston ring set Nural type the piston skirt is thick and with complete steel sheet inside ( each side have complete steel sheet total two complete sheet ) i need 500 set For the KS type, the skirt is thin but also have with complete steel sheet inside ( each side have complete steel sheet total two complete sheet ) i need 1000 set Please tell me how much your price,delivery time and payment terms, Thanks!