You may want to find a used one on e-bay....A reground Cam for a CB/CL350 engine at Bore-Tech http://bore-tech.com/categories/honda-350-cbclsl/cam-and-valve/?page=1 Costs $439. By the time you get your rockers and cam reground, you may of spent a bit more than finding a good used engine, or good used cam parts. Keep in mind the 350 has an Early cam and rockers and a late cam and rockers. The rockers and cams do not interchange with each other.
You might even be able to find a used bike with good parts for the cost, and part out the parts you don't need and get your money back.