Yes welcome i got the same problem as yourself but mine are a bit worse than yours it sound i got quoted £350 from a guy buy me but not sure what it entails ill be talking more with him next week. The conversation went like "can you sort the arches on my 5 door" he said "god another one ok yeah 350" lol. So the price may go up the average ive been quoted was £600 at a few places.