Pack of 20,G5.3 / GU5.3 / MR16 / G4 / MR11 Round Ceramic LED Halogen Lamp Light Bulb Socket Holder Base Wire Connector Adapter MR16 (20 Pack) - Amazon.com
OMTO MR16 GU5.3 GY6.35 Lamp Socket, Common to Miniature Bi-Pin Base G4 G6.35 GX5.3 GZ4 MR11, LED Halogen Incandescent Led Socket Ceramic Body Lamp Holder (12-Pack) (12-Pack) - Amazon.com
5pcs 150 mm Wire G5.3 GU5.3 MR16 Lamp Holder Bulb Base with Wire Ceramic Halogen Socket Pottery Connector - AliExpress
10Pcs GU5.3 Base Ceramic Halogen Light Lamp Holder Wire Connector Socket MR16 Base Wired Bulb Adapter 220V - Walmart.com
Total LED Light G4, GU5.3 Bi-Pin Ceramic Base Socket MR16, MR11 Halogen Incandescent LED Bulb Holder (Set of 10 Pieces) - Amazon.com