While we're on the subject of pumps, does anyone know where I can get a replacement one-way valve/adaptor for pumps themselves? I've got a dual-head floor-pump that uses one of these and some idiot tried to pump up his presta valves when the pump was configured schreader. Using the idiot tactic of "if it doesn't work, use more force", he jammed the presta-valve harder into the opening until it broke off the little nub that opens the schraeder valve. So now, I've got a pump-head that only works on presta mode. grrr....
