I got one from either by Chronos engineering or RDG tools Jim I can't remember exactly.
RDG inherited all the Myford kit when they went bust I had to phone and ask as it wasn't listed but they had one.
The other guy to try is big Jim up in Scotland he got something unusual for me another adapter but once again memory fails me.
Big Jim I can't remember his website oh my brain hurts all these wonderful problems to help with.
Mervin will tell you who he is Merv does his website for him.