2007 525i Front Brakes

[1stE53]

I came here because this is by far the best place to get answers for BMW! My cousin and I have tried twice to replace his front rotors and pads. I ordered pads only to discover they were too large. Long store short I was promised that by ordering the larger rotors that everything would fit perfectly. I got the caliper bracket off only to find the larger rotors would not allow the bracket to be put back on!!! The dealership fed me this incorrect information. They said they don't even stock the smaller rotors and pads!! Any advice would be greatly appreciated. The vehicle was build in October 2006 and is a 2007 mode.
thank you.