Hello!!

I had my car in for service the other day and the dealership told me that my front upper control arm bushings are flat and need to be replaced. They quoted me $3500 to do the work and since that is crazy talk, I would like to do it myself, it looks simple enough.

I searched rockauto looking for parts for my car and they have a ton of control arms. I was looking at a set of MOOG arms, but I am not sure that they will fit. The part numbers are:
Front Upper Left Rear: 4E0407509B
Front Upper Right Rear: 4E0407510B
Front Upper Left Front: 4E0407505B
Front Upper Right Front: 4E0407506B

I have ordered a bunch of stuff through ECS tuning, so I checked their site to see if the prices compare, but their site says that these parts are not compatible with my car .

ECS Tuning shows that I need to have these part numbers:
Front Upper Left Rear: 4E0407509F
Front Upper Right Rear: 4E0407510F
Front Upper Left Front: 4E0407505F
Front Upper Right Front: 4E0407506F

Does anyone know if there are any differences? Rockauto wants $50 per arm, ECS wants $130-$220 for their recommended parts.