It's been quite a while since I was there, so do some research first, but Shelby had a manufacturing shop / museum / gift shop at their facility near the Las Vegas Speedway complex. We took a free tour there about 15 years ago that was interesting. They only had one tour a day there in the morning at the time, so you want to make sure of the time, although the main lobby was open during business hours, and the lobby had cars on display. I did a Google search and Google is returning a Shelby Museum closer to the Las Vegas Airport that wasn't there back then, along with the facility near the Speedway. I don't know if the shop at the Speedway is still there?
You might want to do a search for any car shows/swap meets going on in the area. This is kind of a prime time of the year for that stuff in the South West before it starts to get too hot. I know you won't be there on the weekend, but often there are local cruise's during the week somewhere, like drive-in's.
