Glo-shine E26 E27 to E17 Socket Adapter,Medium Screw to Intermediate Base E17 Light Bulb Socket Adapter Converter Reducer (3 Pack) - - Amazon.com
E17 Socket White Plastic Rectangular Lamp Holder Edison Screw Wiring Base [3PCS] | eBay
Intermediate / E17 Base Bakelite Pin Socket (216SK-731-2) - Action Lighting™, Inc.
Yi Lighting - UL-Listed E26/E27 to E17 Socket Adapter,Medium Screw to Intermediate Screw E17 Light Bulb Socket Adapter Converter Reducer (3 Pack) - - Amazon.com
BERLYUE 2-Pack E17 to E26 E27 Light Socket Adapter, Bulb Base Screw Converter (E17 to E26 Adapter)
Kaufe B22 E14 E27 GU10 G9 E17 Base Socket Adapter Konverterhalter für LED Licht Lampe Lampen | Joom
VEY14 2-Pack E17 to E26 E27 Adapter Light Bulb Socket Converter (E17 to E26 Adapter) - - Amazon.com
CliCli E17 to E26 Bulb Adapter (E26 Bulb in Smaller E17 Socket), Intermediate E17 to Standard Medium E26 Screw Base Socket Converter, Intermediate E17 Base Light Adapter of 2 Pack - - Amazon.com
E17 Intermediate Base Lamp Holder,TWDRTDD US Standard Keyless Phenolic Socket with 5.9 Inch length wire,Mounting brackets for E17 Chandelier Base Bulbs (Black,3 Pack)
2pcs E17 to E26 Lamp Socket Adapter Intermediate E17 Socket to Standard E26 Socket Converter LED Light Bulb Converters Changer| | - AliExpress