It's highly unlikely that local garage will have the expertise to rebuild the steering box. It may well need a new worm gear or at least a better secondhand one. Really, Terry Foxen at GEE Ltd, Nailsworth, Gloucestershire is your best bet. He did a box for me on a 59 Plus 4 and it was excellent (or at least as good as a Cam Gears box is ever likely to get). I wouldn't go to anyone else other than Terry - no commercial connection with him.
Tony
