I got in touch with my old boss, Frank da Cruz, one of the original 
designers of Kermit, which is still actively being supported on the 
Windows and Unix platforms.
There is an updated page with the sources below, 
https://www.kermitproject.org/kermit-20.html.
If you download 
https://www.kermitproject.org/kermit20/kermit20.tap.gz, 
you will have a DUMPER tape image that you can mount, which will allow 
you to restore a running executable.
The person daydreaming in front of CU20A is me, 36 years ago on May 
20^th 1986.  Actually, I'm sleepy as it was a little past midnight since 
that was only period when you were allowed to get system time: third 
shift.  Don't miss that...
 
------------------------------------------------------------------------
 On 4/4/23 9:53 PM, Thomas DeBellis wrote:
 Version 5.3 is the first major release of Kermit-20 in two decades and 
 represents over a year of development for the following functionality:
 ·Updates Kermit to version 7 of Tops-20.
 ·Adds DECnet NRT transport to Tops-10, Tops-20 and Ultrix hosts.
 ·Adds pseudo-terminal support.
 ·Support for batch stream execution, including extensive testing.
 ·Microsecond timing (limited by Tops-20)
 ·Efficiency Enhancements
 ·Symbolic (C) escape sequences and enhanced parsing
 ·New and Enhanced commands
 ·Revamped and enhanced macro facility
 I am still working out where this is going up on the Internet, but for 
 now, HECnet users can feel free to access the package anonymously as 
 follows:
     VENTI2::K20: Kermit-20 Executable and release notes
     VENTI2::K20D: Kermit documentation in various formats
     VENTI2::K20S: Macro source code plus build files for Batch (.CTL)
     and Interactive (.MIC)
     VENTI2::K20T: Extensive testing control files and results
 *Gigantic* thanks to Bob Armstrong for providing /countless/ Tops-10 
 cycles, support and other resources to me for testing and troubleshooting.
 I'm celebrating climbing out of this particular rabbit hole by 
 breaking Tops-20 NFT, but FAL is OK.  I think.