Bozo, Andy - a guy called Kev Thompson from Nottingham had a refurbished rad for sale on the "Honda CX500 best motorcycle made" facebook group. if you can contact him should be able to tell you where he had it done.
I don't know if it's another quirk of the 'new' site but I'm struggling to undestand this 'post''. It's obviously not a PM to me (is it ?) but if it's a general post why does it come up as a 'status' ?
Welcome to the club Tim, have a scan around, there’s sure to be something of interest in the forums, check out tech talk and Rob Davis’s web site, sure to be something there to help with your rebuild 👍