Well, the map for Scotland Yard is basically what it is - I don't think anyone on the planet has created other maps for Scotland Yard and made them available on the www.
There are various players following this game but not that many playing
duck
TH10
mic
aicirt
rawrs
nick royale
to name a few. PM them if you want to run a game, I assume someone will take up the challenge.
If you want to do what nobody has done before, you might want to have a look at the map of Mister X, which is a variant of Scotland Yard
I haven't been able to find a rulebook on the net, but an unreadable map I found and you can get it
here
If this game is fun and we can get the board in readable format as we have for Scotland Yard, we might try it out