I put an aftermarket Audiovox CCS100 system on my 87 Civic last November and I love it.
If you have a manual trans (like me), the only engine wire it needs is a coil signal wire. You will also need to spice in to your brake light wire and 2 power wires but it just took me about 3.5 hours to install. You can get the kit for about $100 off the internet and then you will need to get a vacuum reservoir at a junkyard for $5 or so since the 4 cylinder doesn't have much vacuum at interstate speeds.
The install for an auto trans is a little more involved (I liked mine so much that I put one on my father in law's 2000 Nissan truck with auto trans)
Note- if you put the actuator in the passenger compartment, it does make some random clicking noises as it adjusts pull on the throttle cable.
Glad to hear you had success with that aftermarket unit. I might just have to look into one of them before I make my cross country road trips I'm planning in my VX. Being without cruise does get pretty annoying when driving for hours on end.
On the never-ending quest for better gas mileage...