Well, it's been almost 2 yrs since we lived there, but we had the greatest family doctor ever. Dr. Daniel Chartrand. He's up in McKinney. I don't know where your friend is but he is worth the drive. Very pro-natural, pro-breast-feeding, friendly to non-vaxing. Very gentle and good with kids. He also has an ultrasound machine in his office for mamas who want to just birth at home, etc, and he does acupuncture as well.
I don't know about a good babywearing group but I'm sure she could easily find one. If she contacts the Allen Birthing Center they may have some information. She also might just google it.
Cheapest places for a pump. I'm not sure. I got mine from the hospital when I gave birth, but it certainly wasn't the cheapest. Babies R Us does sell them, I know that.
Best wishes for your mama friend.