I have an old Harley jacket on which the zip has gone, does anyone know of someone who will fit replacement zips on leather jackets - seems this is something of a 'lost' trade these days.
My local cobbler does a lot of repairs to bike gear, boots, jackets, trousers etc. Both guys are really good, nothing is too much trouble. Unfortunately I'm a very long way from you.
Perhaps you should take a walk around your local high streets n see if the cobblers in your area are doing the same.