if you go to yahoo groups you can probably find them. There are at least one or two for Beit Shemesh/Ramat Beit Shemesh. You can try googling Ramat Beit Shemesh yahoo groups. I don’t know if you have to live in Beit Shemesh in order to become a member. It could be you don’t, and if you do, maybe you could find someone to post for you.
There’s also one in Kew Gardens Hill (try googling KGHshuls yahoo groups), and one in the FiveTowns, one in Teaneck, I think one in Monsey, one in Neve Yaakov.