Aftermarket Climate Control?

Anyone know of an aftermarket digital climate control system?  I was thinking that I could tie this in with my alarm to set the temperature on remote start so when I entered the car in the summer I could set this up to run the a/c and reset for winter to the heater.  Like a regulated thermostat  so when its fairly cold the heater kicks in and when its hot the a/c kicks in.  Like set to 70 deg.  Is this possible?  Hmmm??? 

dei makes a temperature control that starts the car when the temp is too hot or too cold

Yeah  thats pretty neat, I'm looking for something that will monitor the temp at start time and make the enterior temp match the temp control mark set for the system.  So essentially if I had a desired temp. selected when the engine was shut off it would have that as the set mark for cabin temp at start up.  Currently I only have the hot cold slide switches instead of the desired degree setting.  Solutions?