I'm right there with you with regards to the security key...I was told by the dealer that it would cost us in the neighborhood of $150 to get a replacement key...OY!! On that note, for the last two vans we owned I got one of the generic keys cut (so I could at least unlock the doors) each van was written off maybe a month after the key was cut (STUPID dumb luck!! Hit black ice and rolled one, then 6 months later hit a moose) Now while i know it had nothing to do with the spare key, I'm taking no chances...LOL
My keys have a lanyard with two carabiners, one carabiner attaches the keys to the lanyard, the other carabiner attaches to my belt loop...this serves two purposes...1.) The second carabiner keeps the lanyard from dangling and gettting caught up in something 2.) It's simply not convenient to hop out of the car without my keys...so I either have my keys with me, or am abundantly aware that I don't (having had to unfasten them from my jeans before getting out)
But I need to find a better system...might look into that tap lock...wondering though how hard it would be to wire...plus I'd like to know if having it wired in is going to void any kind of warranty on my van...cos that wouldn't be so cool