You want the ids for each map in the revo db?
They want in another db but you cannot?
For a start-
A little bit more of an explanation would help you get answers.
Most db's are on the All Things Guide.
Just download all of them and look through them. That way you can do whatever you need to do in order to achieve your goal. (Whatever that may be)
Finally-
There is a search function that doesnt require a PhD to use.