I posted a more thorough explanation of this under the 'Sailor's Lounge' area of our CPYOA website, but thought I'd also add this information to our 'Classifieds' section of the CPYOA site — just in case this area may be more of a place where folks are seeking this information.
Every day, I check on what Com-Pacs are listed for sale across the U.S. I use the SearchTempest tool to do this (for more detailed info, please see my other post under the Sailor's Lounge titled 'Lots of Used Com-Pacs on the Market'). For convenience, as many people also might be looking within a certain region (like me) of the U.S. for a used Com-Pac for sale, I find this tool very helpful.
If you are looking for a Com-Pac for sale via Craigslist, try these links out to see if you can find the model you are searching for:
US East locations (https://washingtondc.craigslist.org/search/boo?bundleDuplicates=1&postal=20004&query=Compac&search_distance=1000&sort=date#search=2~gallery~0)
US Central locations (https://wichita.craigslist.org/search/boo?bundleDuplicates=1&postal=67209&query=Compac&search_distance=1000&sort=date#search=2~gallery~0)
US West locations (https://fresno.craigslist.org/search/boo?bundleDuplicates=1&postal=93703&query=Compac&search_distance=1000&sort=date#search=2~gallery~0)
Hope this info might be helpful to folks. Also, if you have a FB account, I believe the SearchTempest tool will also pull FB results and you can log in to your FB account to see them. I don't use FB, so I cannot speak as to how it works for FB beyond that, though.