This sort of thing seems much more amenable to face-to-face interaction. I would ask around about peer supervision groups - try supervisors, trusted colleagues, and people in your local professional association. You might try starting up a peer supervision group yourself if you can't find something that meets your needs.
That said, I really can't tell if you are looking for peer supervision or something more focused on your personal distress. If you find yourself constantly struggling to manage your stress, consider the possibility that you might benefit from group psychotherapy. Professionals of all stripes are vulnerable to burnout - nurses, teachers, social workers, doctors, etc. - and their issues are probably closer to yours than you think.
Finally, though you may not have immediate control over your practice setting, aim to practice eventually (if not now) in a multi-provider setting where your colleagues become your de facto support group. If day-to-day interactions with your colleagues aren't meeting your needs for support, you might need to think hard about what you need, and why. This should be an ongoing topic of conversation with your clinical supervisor if not already.
