Patsy's does not, and has never used wild yeast (starter culture). What Jeff collected was wild yeast from his own kitchen that grew on dough that he brought back from Patsy's. I could be wrong, but I think Jeff himself has even confirmed this elsewhere on the forum.
Now this does not mean that what Jeff is using is not an amazing top notch starter (knowing that guy I am sure that it is!), but it just means that you might have just as much luck collecting your own wild starter in your own kitchen.
Of course you could always play it safe and get one of the excellent starters from Sourdough.com or King Arthur. The advantage of the KA starters is that they come pre activated, and I find the activation process of the sourdough.com starters to be a big PITA.
Good luck Shan, and I am positive that you will enjoy the benefits that wild yeast will bring to your baking!