Spare parts for C3 &V6

Hello, i need orings for a Cree C3 (14500) and a Cree V6 (18650) to make them more waterproof, a Clickyswitch for the V6 that can handle ~1.4A and brassrings for 17mm standart driverboards. I would like to purchase at DX or KD do anybody know good quality parts at this sellers?