You don't give your location nor have you identified the bike. My suggestion is to look for a Marshall's, T.J. Max, Home Goods, Sierra Trading Post, all the same mother company, and take your bike in and try out their selections. All four have large luggage departments that constantly change and they are essentially outlet stores with reduced prices. They also often feature close outs so they sometimes have hard to find models. There is one other related company, but the name escapes me at the moment.