Wrecking yards and EBay if looking to stay 100% stock and not get hosed at a stealership.
You are talking the external type and not the ones built into the grill right? If they are the external, you could buy regular Hella's at Wally World or where ever and reuse the factory plug if needed with a bit of solder and shrink tube.
05 TJ RME 42RLE with some things
05 KJ CRD 545RFE, GDE Eco tune, Franky II, Al's 4.5 A-arms, JK Rubi Moabs, Silent Armors 245-70-17's, Spidertrax Adapters, Rola Basket, Fumoto Valve, Pinch welds pounded
FS or FT (2) JK Rubi 17" Moab Rims - really nice shape
Need JK Rear Spare tire bracket for project