Thanks, Paul, it appears the company is in Israel, and will be in the mail for a while. It was the only source I could find.
I bought 3 just in case.
I was thinking about casting the same holder as you mentioned, good to know
it will work.
Disclosure to new owner is certainly in order, I was thinking about running it for several one or two hr stints to check it out. Definitely experimental only, but may help others with the same problem. At least it can prove the power unit is good (or not)