I want to find someone who will repair my Citroen C3 Pluriel Sunroof?

I have taken my Citroen C3 Pluriel to a Citroen Dealer in Kings Lynn to repair my sunroof, which has a broken bracket and affects the opening of my boot. They want to charge me a total of £1400 (£89 ph labour charges) I am disgusted, I would rather find someone who is qualified and would like the money in their back pocket.