Convertible Texas

Where are some places I can rent classic cars from in Houston, Texas?

My dad's birthday is coming up in a few weeks and he really likes classic cars. We don't have enough money to buy him one, but I thought it would be a good idea to rent him one for a week or so. He really likes the 68 Impala convertible, or a 68 Caprice coupe. Does anyone have any ideas where I can find a place to rent either of these in Houston, Texas? Please help, it's really important!!

Don't really think of those as classics. In Dallas, there is a movie prop rental company that warehouses some cars from the 60's.