Northwest analogue in UK is the only ''retipper'' willing to
''mess'' with the coils. They invented some machine for the
coils. However in your case any retipper should be able to
(re)solder the wire which are broken ''outside'' of the coil. This
means that the (broken) wire is reachable without the need to
remove the coils from the so called ''joint pipe''.
Northwest site: www.northwestanalogue.com