I was just going to ask this myself! I got a sling at Peapods but it hurts my already compromised upper back. As far as I know, Peapods does not carry Mei tais. Just slings and wraps. But you might want to call them to double check that.
I met someone the other day who let me try on her Freehand Mei Tai and it was great, but I was hoping to not have to order online because then it would take longer to get it.
There is an online store for another company that is based near my home, but I've contacted them twice before and no reply. Left msg yesterday, we'll see if they call me back.
I'm checking out the NINO link right now!! Do you know if there would be anyone there that sells the Mei tais?