Here are kitbug and the programs from the ESS-002 and ESS-004 records:
http://www.moria.de/tech/scmp/software/
The NIBL source is not yet fully restored. The version available on the net contained many OCR problems and was hacked a lot for assembling with asl. I proof read it against the listing, fixed what I found and removed almost all asl changes in favor of a small front end conversion script. I will release it when that is done.
Michael