Las vegas security system providers

I have a computer based product that secures, tracks and manages car keys
for automotive dealers, http://miketurco.com/keydrawer . Somebody recently
mentioned to me that there is something called Regulation 6, published by
The Gaming Control Board, and that regulation calls for tight controls over
keys. (For example, the keys that open slot machines.)

I'm certain that having to track and manage so many thousands of keys comes
with a lot of problems, and I know that my product provides a solution to
this problem.

My strategy is not to go to casinos and try to sell the product myself, but
to find a company who already sells security related systems in Las Vegas,
for whom my invention would be a natural extension to their product line.

If anybody has any suggestions as to how I might locate a company that sells
security systems to casinos in Vegas (or Reno, I suppose), I'd appreciate
suggestions on where to look. Also, if you are aware of casino security
related trade shows related, that would be great to hear, too.

Thanks!

Mike Turco