As common as much in the USA, but there are a handful here in the UK, with the government deciding that they were unsafe after a few were imported. Unsafe meaning exposed wheels, etc..

http://www.flickr.com/photos/hairydalek/4878764909/http://www.flickr.com/photos/hairydalek/4878764909/
We were at Billing Aquadrome on Sunday as part of the PT Cruiser’s club annual bash - they are opening up to Crossfires, as well as other MOPAR vehicles. There was a Prowler there. I have never seen one up close before.