Bilt bags by Cycle Gear ($44.99 on sale) plus miscellaneous hardware from the garage to make my own brackets. I started with four Home Depot galvanized 9 in. steel landscaping stakes. I bent them, connected them two per side, and mounted them on my dresser rail. I can use them with my solo seat, with my stock seat and sissy bar, or simply take them off within a few minutes. They stay planted at speed and even came with rain covers and shoulder straps. Pics below show how easy they are to make and mount.