Facebook comes in handy for things like this .

There are a lot of STR Poconos groups on Facebook. 

My only contact with her has been through private message on Facebook.

Go to facebook and type in "Business Owners California" or "Orange County Business Owners" or some combination of that (and maybe a few other key words).  

I keep seeing a company on my Facebook feed claiming they do it for ten percent and assumed that was the going rate.

That’s exciting that you’re ready to make that jump.There are a couple ways to find off market deals, meet ups, Facebook groups, a realtor who’s connected to wholesalers such as myself or even the old school way of sign calling.

Definitely one in Waynesboro you can find on Facebook called "SAW real estate meetup"Welcome to Bigger Pockets ! 

I tried networking in a few local groups on Facebook but I don't know these people well and their recommendations have been a part of my failed search so far. 

Aside from Facebook groups, local meetups and cash buyer lists on Propstream, does anyone have any suggestions on finding new investors to add to my cash buyer lists?

Join the CT RE Facebook groups as they are generally advertised there.