There was a discussion a while back about whether the track fork of a Bianchi Pista Concept could be drilled to accept a front brake. Check out the pics. I started with very small titanium drill bits and worked my way to the correct diameter for the cane creek sl brake. I then did the back side of the fork to accept the nut that holds the brake. It took about an hour or so. The most difficult part was removing what looked like a bolt inside the fork that had been "bonded" inside the fork where the brake would mount. Note where the drilling occured is not actually carbon, but aluminum. The carbon of the fork doesn't begin for about an inch below the brake pads.
Note I called Bianchi USA to ask if it could be done - they said "no, buy a new fork". Of course I'm sure it voids the warrenty, but..."