You should be able to do a simple google search and find a bike you like with the Gates Carbon belt drive and most will come with a 3-speed IGH. You'll have to customize the bike by purchasing your own N360 or 8-11 speed IGH, at which point you could install the Bafang, but you'll need an adaptor for the chain ring, as the stock BBOS don't come ready for belt drives. Additionally, you'll have to check the bike you purchased, to see where the belt tensioning screws are located. If they are located underneath the BB then you'll have to consider a rear/front hub conversion. I've seen few belt drives that tensioners in the rear of their drive train. There are many places to find this information and conversions for belt drives. Good luck, google is your friend.