T.F.
Does your neighborhood have a website? Check that out for mom's groups.
Walk in your neighborhood and meet people.
Go to the library for story time.
Walk in the malls and go to the paly area. Play area at McDonalds or other fast food place.
When your children are playing with others, figure out who the mom is and start chatting. Talk to other moms at the park, library, etc.
Good luck.