I think the real trick to making an actual La Folie clone is to do what they do - BLEND.
You can use one of the La Folie clone recipes which I think was in a BYO article. But even if you had their particular bugs it would still be very difficult to get the same flavor. If you do want the bugs I think your best bet is to try to find a La Folie Barrel. Not sure how to go about this, but supposedly they exist.
Your best bet is to brew a bunch of different batches using commercial bugs from Wyeast or Whitelabs. You can add some other dregs if you want. But the big thing would be to age them all differently. Using different fermentors, use different locations in your house (for different temperature profiles).
I talked with Eric Salazar last year about La Folie and blending. He is a very approachable and really enjoys talking with homebrewers. I wrote up a little article about their process in a blog post: