did not need a new one so didn't go to United Autos, managed to find a 450cc rated used Rotax CVT from AutoRace in Rawalpindi, it's located at the start of the Committee Chowk Underpass on Murree Road (if you're in the direction going to Faizabad)
the shop primarily deals in ATVs and the guy there quoted me 45k but after a lot of bargaining he gave it for 25k