Dealership participation does vary in availability and service for electric and natural gas vehicles. 

Due to the unique nature of AFVs, some vehicle upfitters and dealers make their vehicles available nationwide.  Those that we are aware of are listed below.  Many of the major fuel associations also provide information on vehicle availability.  Those are also below.

The full AFV offerings of the major manufacturers can be found at the U.S. Department of Energy's Alternative Fuel Data Center.  You can look through both