Tail Gate Party Controls

I saw this and would love to make one to control my DVD player. Anyone know where to get the switches for this?

  http://www.m-emag.com/article.asp?section_id=11&article_id=60&page_number=3&preview==

here is the part of the article that interested me in case i was to vague -

Also on top of the amp rack is what Kenney calls a "tailgate-party remote." He made the touch-pad remote using two PAC SWI-3 OEM interface units, which are designed to allow stock steering-wheel stereo controls to be adapted to an aftermarket head unit. Kenney designed the remote's touch pad by laying it out on a computer. "Then I printed it out, laminated it, lined it up with the corresponding switches, and programmed them to do what I want them to do," he describes. "The owner just wanted something to control the volume from the back, and I just elaborated on that."

mattwho?