If you don't mind about picture quality, you could just use a standard composite cable to connect it to your tv. If you want a slightly better picture, you'll want to have an RGB-Scart cable. They are pretty common so I'm sure someone here can sell/give you one for a few pennies.
You could also try to find a Commodore 1084 monitor. Even those are still pretty easy to find and shouldn't set you back for more than 10 Euros.
