Turns out (after a search) I DO have another key, or at least the hollow shell of one. The black plastic part is all broken (no battery, no light) but it does actuate the doors and trunk! Yay! Locks the central systems easily, but I have to grab the key in a pair of pliers to unlock it. Had me sweating bullets for a few minutes, as I was locked out of the car. Perhaps the actuators just need some lubricant or maybe something is a little bent in there. I'll have a look if we ever get above freezing here in SE WI. I have a stereo install waiting on operable door locks, so we'll see what I can accomplish.
Should I lube the locks with graphite or something else?