E17 to E26 Light Bulb Socket Base Adapter Converter - Converts Intermediate Socket (E17) to Medium Socket (E26/E27) (Pack of 2) : Amazon.co.uk: Lighting
Adamax Intermediate to Candelabra Base (E17 to E12) Light Bulb Adapter A1712E - The Home Depot
5w E17 LED Lamp Bulb,40 watt e17 Base Bulb, Warm White 3000k, Intermediate Base ,AC 110v-130v, E17 Intermediate Base Bulb (Daylight White 5000k 4 Pieces) : Amazon.co.uk: Lighting
Feit Electric BP40T8N-130 Incandescent Lamp 40 W T8 Lamp Intermediate E17 Lamp Base 340 Lumens: Appliance & Sign Incandescent Bulbs (017801692907-1)
E17 Intermediate Base LED Bulb, 6W (60 Watt Equivalent) G14 Globe Ceiling Fan Light Bulbs, Warm White 3000K, 600 Lumens, Non-Dimmable, Pack of 6 : Amazon.co.uk: Lighting