Get some Tektro CR720's, and you can run whatever wheel size you want. There aren't many bikes I've run into that cannot be adjusted to either wheel size. There are those few though.,,,,BD

They come in silver and black, and you will be able to do endo's if you want.

Tektro CR720 Cantilever Brake Front or Rear in Tree Fort Bikes Cantilever Brakes (cat1233)