Just so you know:
I been in touch with 2 different people now about this. And, I'm happy to report that my concerns were unfounded. Dynon does not appear to be out of stock on anything I needed, except the EMS sensor kit for 4 cylinder Lycoming. And, I've been told that they expect to ship that in 2 weeks.
The first contact was a sales/marketing rep on Dynon's FB page who assured me that the webstore's "out of stock" listings were not accurate. The second was an authorized Dynon dealer who said he could get what I need shipped direct to me right away.
The folks at Dynon continue to be awesome!