Hi,
Bought my Rev-D Diverter Valve and a cam follower from ‘Awesome GTI’ online. Not the cheapest, but everything I’ve had from them has been 100% solid and original. No cheap knock-off Chinese replica parts.
I have a K04 2008 Golf Ed30. Have a Ramair induction and a Forge DV adapter. Good luck with your build pal. 👍🏼