I installed the handle bar risers from Wingstuff and they work great for me. I'm 6'1" and 300lbs. I paid a half hour labor charge ($35.00) to get them installed. Type in Handle Bar Risers in the search box on this forum and you should get results. Hope it works out for you!!
That bike of yours could likely take any same diameter bar going , just a question of finding the set that suits you better. Lots of choices out there so just do a search and see what catches your eye.