Dunno how much it would cost to ship to the States, or if you could source it somewhere locally, but if PB is out of stock on the mounts then they are available from MEC (Canada's REI). I have used both the spare bracket kit and the rack bracket. For $3 and $2 respectively you can't beat the price. I recently moved the mount on my wife's bike from her seatpost to the left seatstay to make room for a tag-along hitch. She rides a "commuterized" FS MTB and the seatstays are too fat for the little bracket, but too thin for the seatpost bracket. I had some leftover material from a grip that I cut to fit a grip-shifted bike, and it made the perfect MacGyver gasket to fit inside the seatpost bracket.