Yeah it's definitely and AC to AC transformer you need.
I hadn't thought about Bell transformers, if you can get one with an adequate amperage rating then yes, it's a good one too.
There will be a few different places you can talk to to find these things, but I know that when I started looking I had some difficulty finding them at first. It's very easy to get from the large electrical supply houses but only if you have an account with them.
Gray