Looks like an old post, so not sure if you're still around or if you got a support group together. Can relate to what you're looking for. Estrangement happens for different reasons. Sometimes you need a support system to get you through an issue, and sometimes there is some kind of abuse that you can't go back to and you need a support system at the commitment level of extended family. There are resources out there, like counselling, support groups, community groups,
www.CreatingExtendedFamilies.com and more. Hope you found/find what you were looking for.