Originally Posted by
LesterOfPuppets
There's always the drop bolt option, too. Could come in handy if you wanna go with some brakes with 80mm reach but need a bit more to get your 99mm reach.
http://sheldonbrown.com/home-drop.html
This might be a fun project, in and of itself. I might keep an eye out for some inexpensive caliper brakes to use. Any suggestions that won't break the bank? Also, will MTB size tires fit under caliper brakes?