I may be too late to this conversation, but in my opinion (with a lot of lighting guy experience under my belt) the Elation DP-415, mentioned earlier in the thread is exactly what you want, and they're around $125.
Yes, they are dimmer packs, and you should never use a dimmer pack on anything other than an incandescent bulb. Most other devices have a step-down transformer before any motors or circuit boards, and that is what will blow if you use a dimmer pack as an on-off switch. Been there done that.
However the DP-415 (I have 2 of these) is a
hybrid dimmer pack, which means at the flip of a dipswitch, it becomes a relay pack, turning it into a 4-channel remote switch, no dimming. DMX 0-127=off, DMX 128-255=on.
Slightly fancier and a bit more money is the Chauvet DMX4
http://www.chauvetlighting.com/dmx-4.html . It can handle more power, and is also a hybrid pack, but each of the 4 channels can be independently assigned as either a dimmer or a relay, so it gives a bit more flexibility. I also have one of these, and use it to control my hazer.
Sounds like you already have a custom solution in place, but if that doesn't pan out, these are my recommendations.