Just had 2 very out of round Speedlines (5 spoke) straightened by Lepsons over in Gillingham in Kent. Amazing job they have done too.
The inner rims of both wheels were seriously out of round, probably due to having been dropped into potholes at some time in their lives. One almost resembled an Austin Allegro steering wheel in shape I hadn't been able to find anyone who would be able to do anything with them, and came across Lepsons just by chance.
The wheels are absolutely spot on now - not just nearly round, but absolutely dead right. Don't know what sort of kit they use to do the job, but it certainly works. The job cost £32 per wheel (inc VAT) which I thought was pretty reasonable.