My name is Nick, I'm a Director of a small company called Steamboat Billy. I've got exactly what you're looking for. I've got the pavement scrubber and a trailer mounted Karcher high pressure washer, which has a capacity of 700 litres and operates at between 30 and 200 bar and up to 150 deg steam. These are both newish machines with very little use, the scrubber has had about 20 hours use and the steam cleaner about 250 hours. The trailer has been recently serviced with new hoses, I have also got a 50 metre extension hose available.
Hope this is of interest to you.
kind regards
Nick
Phone: 01323 846141