Source G4 Socket Ceramic LED Halogen Bulb Lamp Light Holder 12V 110V 220V g4 halogen lamp socket type g4 lamp holder on m.alibaba.com
10 Pack G4 Light Socket, MR16 Socket, Letaclanic LED Halogen Lamp Ceramic Wire Connector Base Socket Adapter G4 MR16 MR11 GU5.3 GU6.35 Socket (Pack of 10) - Amazon.com
Quluxe G4 LED Bulb Socket Halogen Base Ceremic Lamp Holder Socket, Miniature Bi-Pin Base Socket, Halogen Incandescent Led Socket Ceramic Body Lamp Holder (Pack of 10) - Amazon.com
G4 Base Holder Wire Adapter Halogen Socket Connector f. Bulb Lamp LED | eBay