My 2 cents would be the following...
You are DEFINATELY going to need those bayonet bulbs if you are going to keep that game so go ahead and buy some. I have transitioned to the LED version of the #47 bulb. Brighter less heat with a longer lifespan. MUCH more money to buy is the drawback with LED's.
With that being said. Take a known good bulb and insert it into the socket where your "blown bulb" is. If it doesn't light either your problem most likely is the rear contact in that socket. The head units are known for this issue.
As usual my advice is free and worth every penny.
Ra