I am happy with the work jrrestore did for both my '83 Trek and '92 Guerc.
I've also bought tubing decals from cyclomondo and was reasonably pleased (the fork decals in the package - 531c, were too large but I didn't need them for my application), but I haven't tried him on manufacturer decals.
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72 Frejus (for sale), Holdsworth Record (for sale), special CNC & Gitane Interclub / 74 Italvega NR (for sale) / c80 French / 82 Raleigh Intl MkII f&f (for sale)/ 83 Trek 620 (for sale)/ 84 Bruce Gordon Chinook (for sale)/ 85 Ron Cooper / 87 Centurion IM MV (for sale) / 03 Casati Dardo / 08 BF IRO / 09 Dogma FPX / 09 Giant TCX0 / 10 Vassago Fisticuff