If you check the Mad Fermentalist's site, he has a list of sours with viable bugs. He has a question by Monks Cafe, and indicates that it probably doesn't have anything. That said, I did successfully grow the bugs from it, so I believe it can be done. Maybe mine was a fluke.
After having done a number of sours, I wouldn't worry about getting the specific strain. I would suggest brewing a decent Flanders Red recipe with any Belgian yeast, then adding the dregs of a couple of bottles of Jolly Pumpkin (any should do, but try for La Roja, and get them as fresh as possible - they have bottling dates on them). Toss your dregs in with the yeast.
Why Jolly Pumpkin? The bottles are fresher than most sours. The Pedio in them seems to be more tolerant of IBUs than most. And they all have active bugs.
One issue with propagating yeast from a sour, is that the yeast will reproduce, but the bugs will not. The bugs and Brett will take much longer to reproduce, so by making a starter with them (and splitting it up), you just dilute the bugs. It takes about 12 months for Brett to reach it's maximum population and up to 2 years for the Lacto and Pedio.
|