Did you already try your bike store? E.g. most internal gear hubs (and f/r hubs with drum brakes) have imperial thread in different sizes. Generally, only hubs for derailleur systems (and track hubs) have metric thread.
@Dutch_Cheese started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
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Did you already try your bike store?
E.g. most internal gear hubs (and f/r hubs with drum brakes) have imperial thread in different sizes. Generally, only hubs for derailleur systems (and track hubs) have metric thread.