Yeah i been in that same spot when i stuffed the Ford Focus lights in my ride. I fortunatly have the Rancho Auto Recyclers not to far away.
www.rcsr.com anyways they usualy have alot newer vehicals than pick n pull and will sell you just the pig tails for almost nothing since harness of any kind usual go with whats left of the car to the scrap metal place, cuz realy who needs that part off a vehical.. well except us huh.
Try callin the lexus shop out there and seeing if they have what you need.