Welcome
Where about are you in bucks?
as Gervais said I would reccomend Le Mass in Chalfont St. Peter, I used Tom to do all my body works and I'm very happy with it, if you want to see his work let me know and we can meet up somewhere.
I would pay him a visit and see what he says before changing the bumper, but, if you really want to change it, I could give you mine and instead you buy me an aftermarket one
(Gervais, do you use Tom too? )