LH0888 Converts a G24d-2, GX24d-2 Socket to an E26/E27 Medium Base lamp Holder - - Amazon.com
Amazon.com: GE 18559 - F13DBXT4/SPX35-13 Watt - 2 Pin G24d-1 Base - 3500K - CFL : Everything Else
Leviton 26725-202 G24d-2 Base, 18W 2-Pin, 10mm Compact Fluorescent Lampholder, Vertical, Bottom Snap-In, Green Color Code, Quick-Connect 18AWG Solid or Str. Tinned, White Body - Wall Lamps - Amazon.com