There is 1 in the Montgomery County area.. Its off of Dekalb Pike in Blue Bell.. Here is the website, the company is Duke's Firehose Safety Wash.. My friend used to work there and he told me all the high end cars (Ferrari, Lambo, MB, BMW all the time) roll thru there at least once a week, sometimes 3 times a week. Price is fair and wash is very safe and clean. They also do a hell of a job detailing too.
http://www.safetywash.com/