Hi Nick and Ruth,
Many thanks for your excellent list of possible helpers!
I tried them all and got some joy out of caravancrazy. Now I’m waiting for a reply from them after sending photos. O’Leary’s is near me so I’ve already visited them but they could not help.
I’m going to go to a local craftsman on Monday, lockdown permitting, so will keep you informed.
Hope to meet up sometime in the future.