FM will probably jump in here, but he offered a couple different D26 sized bi-pin modules. I still have one that runs on Strion 3.7v lamps. I think FM also made a D26 module that worked with G4? lamps called "Sunshine" or something to that effect. The pic on the right are the MN to G4 towers for SF turbo heads.
Ebuchner is looking for (MN socket) the one on right side of your picture.
Left side picture is (G4 D26) Sunlight andtheseare with G2 socket.
He is looking for MN type bulb socket used on M-3 Turbo, M-4 and M-6 flashlights.