Wordpress theme for existing website.

I am looking for a Wordpress theme for my car rental company. I have an existing website, and I need a similar theme. Is there anyone will do the same here?

Please advise.

As I can see your site is made in ASP.Net . My advice is to make new site on test server and when is all done migrate to live domain.
There is plenty car rental template on themeforest.
You need to check yourself what you like and see functions. Maybe is sometimes better to build custom made site. It all depends what you want on site.
But from my experience car rental must be easy and fast in 3 step choose and pay.