If you make this an open meditation group for all MBSR graduates, maybe you will also get a response from others who are looking for something like this. :)
I did my MBSR course from CFM, Shrewsbury, MA in 2016. I actually enrolled in Margaret Fletcher’s class, but due to some scheduling conflict, she couldn’t make it, and our group was taught by Melissa - who did a great job teaching us, BTW. I have been in touch with my classmates (a few of them are now MBSR teachers!), and a small group meets every Tuesday morning via WebEx, hosted by me, online for 45 minutes. So I know this is a great way to continue our practice. I highly recommend such an online sangha, it’s been very beneficial for me.
I also attend a bi-monthly Practice Circle online on Zoom, and you will see a few MBSR graduates/teachers there along with folks from different parts of the world, check it out and see. https://presentmomentmindfulness.com/practice-circle/. It’s free and open to all.