Bob,does your Nord Electro have a dedicated Leslie socket (like some other makes have)? It didn't appear to have one judging by the website info. The reason I ask is because you mentioned that you might want to get a Leslie for the Nord. Be careful here because a Leslie that is designed to hook up to a Hammond usually uses a multipin connector, and requires an external preamp/switching box to use a "standard" electric guitar or a keyboard with a 1/4" jack....
Try to get a matched set; I have seen people that bought, say, an A-100 (a C-3 with an amp/speaker system built into it), and then a Leslie that was "supposed" to match up to it , and found that the wiring had been "modded" to accept a different model cabinet.
As for some sources of info, try the organforum.com and Google Dr.Fishsticks for Leslie wiring and switching kits. Also, there are a number of Hammond/Leslie parts suppliers on e-Bay (but you knew that already, I'm sure).
I have an M-3 spinet that is a load of fun on Saturday nights after a couple of shots. REAL organ players love the "waterfall keys" and I took the little Leslie 45 with a 12" Jensen and rocked it with a 12" Altec driven by a Dual Showman Reverb head. Not what you are looking for, I'm sure, but still a hoot. There's nothin' better than a real Leslie moving all that air around the room.