I have used a Meyle HD front end kit on one of my Phaetons and it seemed like good quality control arms.
Best Control arm for Volkswagen Phaeton
TRW is the original brand manufacturing the control arms that are sold through VW and you can get those relatively cheap directly from TRW at least here in the US.
Over the last 6 months I have replaced all front suspension control arms with new TRW arms.
I had the same problem: this is what I had done: replaced rotors and brakepads, short time result replaced the wheelbearings and hubs, and new rotors again, shudder almost gone, only noticable on very flat roads and only on some speeds replaced all the control arms and that solved the whole problem.
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