where can u find good maps for 03 954 with jardine bolt on modyfied air box stock filter and a 20 shot of nitrous wanting to richen up top end to go to a 40 shot

that, my friend, I can not help you with.
Custom maps are hard to find and rare to be right on if found. You'd be best to go and get one made up. Localy here it's $250 for one.

But since you ask to richen up the top end you can just adjust your power commander for that. That's if you are running the pc?