I am having trouble finding a wedge bag that will fit under my B17. For instance, I just bought a Topeak Medium WedgePack and the quick-release railing attachment is not the right size to fit the rails on the B17. I'm looking for something that is medium size (enough for 2 spare tubes and a multi-tool at minimum) and good build quality. I would prefer a bolt-on attachment to the saddle rails (versus velcro straps) if possible.
Must also cost no more than $25.