Maybe give them a call and see how they did it/would do it now?
Actually just found a thread on here in which a couple of people have had their BBs retapped to English from French. Think they said Hackney Peddler did it so I'll try them out.
@Dropped.Bars started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Maybe give them a call and see how they did it/would do it now?