Sorry but it doesn't exist, not even from Viking. Unless a another owner drew up their own.
Do you have a battery installed on the trailer? The lights are 12v, not 110v.
Also, lights are connected to a kill switch on Popups. You usually have to setup the sink so it compresses a plunger switch.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity