Ok, ordered the rear LCA aero cover kit from NGP - 2 covers + 4 plastic push rivets....about $50 delivered. I know I know...e-acca but I didn't feel like waiting and I like to toss some money this time of the year to the shops/vendors I like and NGP is one of them. Total install time. 1 min. hahaha Can't see needing anything beyond the push rivets, they are v. snug and secure.
VW spec them so that there is no chance of you ripping them off if you reverse over a rock/branch....etc...remember the fixings specs were originally made for the MK5 Golf onwards "stone protection" rubber covers which I originally retro fitted...VW just kept the same fixing for the MK8 Golf aero covers....
...but as I say in that how to guide...plenty of people have tracked their cars etc & had no problems with just the push rivets when used on the MK8 aero covers..