I am not an A&P, so I might not be accurately describing the problem. But what I think I was told is that I have a burned intake valve, bad valve seat and valve guides that are too far gone for reaming.
You might want to consider sending it to Corona Aircraft Engines for overhaul. I just picked up a set of four cylinders from them, overhauled to new limits. With parts and labor, the total bill was a bit over $2500 for four cylinders. This included replacing all the exhaust valves (which they did cheaply with used, overhauled valves from their stock) and porting the valves for better flow.
Even if you buy a serviceable cylinder in the meanwhile, having an overhauled spare sitting on the shelf ready to go can save a lot of down time in the future.