Cheetah Trading Post at Amazon has "Simba Lighting E26 Light Bulb Socket Adapter Black (3 Pack) with 2 AC Outlet Plugs and 1 Light Bulb Socket for Indoor and Outdoor Use in Attic, Basement, Garage, Medium Screw Base" for $6.95 – a 20% coupon brings it to $5.56
Two 2-prong outlets and pass-thru E26 for light bulb.
https://smile.amazon.co
A two-pack comes in about 80c cheaper.
Off-white here
https://smile.amazon.co
Pull-chain versions available.
B09HJM13T7
B09HJSZ83S