I really don't have any experience with this seeing as I haven't even racked my 6 month Flanders Red yet but when I do I plan on purchasing anything new that is plastic that would come in contact with it. Any tubing, racking cane, beer thief and especially the bottling bucket. That one seems like it's the biggest piece of equipment so has the most chance of getting infected.
These bugs are tougher to get ride of than your normal bacteria/wild yeast.
I hate Walder Frey...