Thanks for the replies folks.. and for taking the time to look.
Unfortunately I don't have the original broken part anymore... someone thought it was scrap and binned it... so I don't have a template.
I've hunted up and down the Hobao sites and also can't find anything that looks like it.. I'm...
having nearly completed the last rebuild (to my own weird specification..) I'm starting on the next.
This was picked up described as an Hobao hyper 7.. with a few issues.
Now, I can't find anywhere what the heck what version this is, it's got an Hobao servo in it, but I can't find anything else...