10x 12V Halogen LED Lamp Holder Base Socket Plug for G4 MR16 GU5.3 MR11 GU4 New | eBay
E-Simpo 10pcs E26/E27 to MR16/Gu5.3/G4/Gu4 - Standard E26/E27 Edison Screw Base to MR16 GU5.3 G4 GU4 Base Adapter Holder Converter (Ceramic Material) - Amazon.com
Ceramic Gu4 / G4 Lamp Light Bulb Socket Lamp Socket with Clip and Wire - China Lamp Socket, Light Socket | Made-in-China.com