Sure, it's possible.
Here's what you need to do:
Take apart your expensive Alpine unit and dismantle the touch controller.
Determine how the touch controller works, and how to adapt it to some input ont he PC, most likely serial or USB.
Engineer and create an adapter from whatever port to the touchscreen
Write drivers for the touchscreen on the PC.
Good luck with all that....
Now, had you actually done some reading, you'd find out what needs to be done, because this has been discussed on these forums many, many times before. You'd also know that someone has already done this for another make of touchscreens.... Kenwood, if I recall.