Pista front disk brake

I've heard of brackets to mount disc calipers to the rear but would put money on no such thing existing for a front wheel. Running disc breaks on a non-disc fork would be a recipe for a nasty snapped for incident, they just aren't designed to take large lateral loadings. If you really want disc breaks you would need a new hub, and new forks, may as well get a new bike really.

+1