Anyone remember if Cannondale made a Headshock Stem with a hole drilled in the middle to run a cable for Canti Brakes?

I think they did for a short time.

Anyone have one they want to sell?

Wow. I had a HS back when they first came out and what they used with canti brakes was a goofy roller-thing that mounted to the hole above the front wheel on the fork. I forget what they called it, but you'd be better off getting new front brakes and a roller-thing so you can keep your levers.

Just drill a big hole in the top and a small hole in the bottom.. homemade cable stop.