soupdragon68

Hi new member hear, need help!!! I own an 03 legacy saloon. Having gone through the trauma of having the head gaskets done. I thought all would be good using car again. Booked car in for new mot and it's failed!! You cannot see any rust on the car and I have cleaned and treated the surface rust on the underside. But it needs new outer seal panels? Any one have any idea where I can buy pattern parts. Or is it still possible to get them through the dealer network?? Thanks in advance