Sorry to hear of Ken's passing, I worked with him when he was a technician at Cadnetix back in the 80's, before he left Boulder for Oregon.
He was a gentle soul and a nice person, and was very passionate about the products that he built.
I am an electrical engineer and software developer, and I would be willing to help resurrect his product line if the necessary information is available and there is sufficient demand for one or more of his products.
The first place to start would probably be with his next of kin, assuming he had no formal estate, and they didn't throw everything out when he passed away. Schematics wouldn't be too hard to duplicate, embedded software and application software are another story altogether.
If anyone wants to put together or join a group to investigate resurrecting his products, let me know and we can arrange to meet online.
PS, I also have one of his original products, the PEP-3, a guitar effects switcher. If anyone would like to have it, please let me know.