I have an offset mount that works for a 6P or G2 that I'm not using if you want to go that route. It was a VLTOR Scout Mount IIRC. It's in my parts box. I can see if I can find out what I paid for it and get you a price if you are interested. I personally wouldn't be interested in cords and switches. It gets overly complicated quickly for something you don't really "need" for our uses. YOu need to work out what you plan to do with respect to VFG or angled FG before deciding on a light mount though. They all have to work together.
I have ran my AR without FG, with an VFG, and now have a AFG on mine. Not sure I love it yet.
Mounting something like a TLR-1 or similar on a long gun seems to be the new popular thing. It makes sense to me too since I don't take my AR out of the safe very often. It would be cool to just grab an extra TLR-1 or the one off my pistol and put it on. I personally will prob go this route if I decide to mount another light on my AR. I got my TLR-1s for $99 shipped so that isn't bad vs buying a mount and another flashlight and maybe even a switch.
Call me or e-mail me if you want to look at my mount. It's simple and I will sell it cheap.
EDIT: I think this is mine.
Price looks to be between $25-30 plus shipping. I'll let mine go for $20 FTF. It's a cheap option if you are unsure what you want to do. I am guessing you prob already have a SureFire that will fix it.