Just run the car all the time with the sidelights on. Save the money.
Also has the advantage of the rear lights being on. Moreover, wingtop Morgan lights are puny attention grabbers compared to modern DLRs, so why not just run with dipped headlights on at all times? Or, if the headlight has an internal sidelight bulb hole, try a Classic Car Daytime Running Lights Conversion Kit from
www.bettercarlighting.co.uk/index.php?searchStr=DRL&act=viewCat&Submit=Go Usual disclaimer.