I'm kind of building this right now with my Voyageur.

My wheels are 36h Avocet hubs on Wolber Super Champion rims and a Suntour (something like) 14-34 Freewheel. Crank is a Takagi Tourney XT 48-38-28. Pedals are Union beartrap clones- need some Cristophe toe clips. Bars and stem are 3TTT- if those are too new, I'd like to get an SR stem and SR "Randnner" bars. The brake levers are the slotted Superbe (with Mirrycle Mirror) and if I had the brakes I wanted, they'd be the Shimano MC-70. I really like the Sachs/Huret ratcheting downtube shifters they feel so nice and smooth- and they're not very common. Since we're talking friction era... I can't use what's on the Voyageur now... so I'll go with a Suntour VGT Luxe rear (because I've never used one, but they seem to be well loved) and a Suntour AG Tech in the front. Saddle- I really like the San Marco touring, but it doesn't have bag loops on it (for some reason), so I might go for the Avocet Touring II.

If I could find a source for a new version of these Specialized Expedition tires... I've got 1 1/4 in the front and 1 3/8 in the back. They're fantastic. But they're 30 years old...