Having watched Evan's TSi brake upgrade suggestions on YouTube (thanks!), I'm looking to do the same but couldn't find the part numbers anywhere other than a partial reference on one of our fellow builders' sites. To make it easier for anyone else looking at doing this, Matco have advised the change from the WHLBE5-1 brake assembly with the WHLD164-017 disc to the WHLBE9HE-1 brake assembly and the WHLD164-017HE disc. There is also some sundry hardware included on the quote they sent me, so it's best to contact them directly.
Hope this helps.