I never found a therapy group that either my T or the group T's thought I was a good fit for, either.

The 12-step programs are well-known as support groups -- mostly for addictions, but there are several that aren't: CODA, Emotions Anonymous, and Adult Children of Alcoholic and Dysfunctional Families. They are not nearly as common as the AA and related groups, though, so there may not be any near where you live. They have some online groups I think, but I've never tried them. Not sure what they would offer that PC doesn't.

I didn't find a lot of help for my underlying issues in the groups, but I did find some fellowship sometimes. And they were a place to vent and not feel so lonely and isolated.