Gah sorry, that should have been powered by a 9 volt battery, not 12. For the switch I was just going to get a standard toggle or rocker switch - basically any will do so long as it's quiet and easy to press. I still had no luck finding out the current though sorry.
I
'm been looking at some different products, and was wondering if something like this might do the job? **broken link removed**
Another thing I was considering is would it be easier to have a remote control set up of some sort? I've seen quite a few different types for sale, but I don't know if it's just a matter of soldering two wires and then it's done, or if it's more tricky than that.
**broken link removed**