Knob style diconnect with built in bypass circuit builder. Choose between top and side mount as appropriate. About $20.00 with taps and $10.00 without. I found mine at WlaMart on sale for $3.00.

http://www.wirthco.com/battery-fuse-...7_33-l-en.html

Jegs and Summit sell solenoid based diconnect systems and you can remote mount an activation button. Most of those also have built in bypass circuits and run about $100.00

Wirthco also sells Tap/Gound kits for establishing either 2 or 3 circuits if the disconnect does not have a built in bypass circuit. I think they are about $5.00 a set.

http://www.wirthco.com/battery-fuse-...7_75-l-en.html

The wirthco stuff is avaiable at Northern Supply and I have seen the basic disconnects at WalMart and even seen them at Flea Markets with the tool venders. I suspect that Harbor Freight will have them as well.

Napa, Advanced Auto and Pep Boys did not have them. They seem to only have the old "watchman" turn-key type.

P.S. You might consider a three circuit tap and use one for the brake, one to maintain your clock and radio (prevents the constant reset) and the last to power your security system.

P.S.S. On my vehicle, even after the power is dosconnected, I have to have the ignition turned on to release the steering column lock. Another POGger (Paul Horner) provided the advice of having a flat metal ignition key copy made. That way you don't have to worry about leaving the coded key in the ignition. This copy might start the vehicle, but without the chip in the key, the vehicle shuts down after running about 5 seconds.