I had a leaky rad on my 47/48 Squirrel that Graham suggested should be replaced.
The rad showed that it was supplied by Northern Radiators Limited of Leeds (contact@radiator-repair.co.uk)
When I contacted them they suggested I send them the rad for a quotation.
In the meantime I ‘found’ Bryan & Son in Tunbridge Wells, 01892 544635, closer to where I live on the south coast.
When I visited him with the rad he was building a new rad for a Bugatti!
2 hours and £70 later I had a repaired rad.
Dave Bushell, the Club’s librarian, has also used him.
Good luck.
Frank
