there used to be one, but it fell apart. The people running it had a daughter who outgrew the group and moved on. No one took over. I have thought about starting one, but I just don't have the time to do it right. I would be interested in joining if you started a meetup group.
We live on the Northeast side of Dallas.
BTW... my son is 11 too. He is in a social skills group with three other Aspie boys, and I would be glad to share the information with them if you start a Meetup group.
If you are interested in just getting in touch with another mom in Dallas area, send me a PM. 