I got a 7 round to a flat 4 pin at Harbor Freight. Around $15, if I remember correctly about 4 months ago. It is a coil type also.
You can order on line or buy in the store. Dean
2006 Allure 430 #31437 (Cummins 400HP Engine), 2000 Tahoe Z71 Toad, Sanger V210 Ski Boat. Lifetime Good Sam Member, Lifetime NRA Member, US Army Vet