Try Gil M at Retrodecals: https://www.facebook.com/retrodecals/
Never used him myself but has very good feedback over on Retrobike, does mainly retro mountain bike stuff but may be able to help you out.
@Egghead 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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Try Gil M at Retrodecals:
https://www.facebook.com/retrodecals/
Never used him myself but has very good feedback over on Retrobike, does mainly retro mountain bike stuff but may be able to help you out.