At the end of November I ordered a pair of Dugast Paris Roubaix Cotton tubulars (27mm width) from the Andre Dugast web site:
http://www.a-dugast.com/
They arrived this week. They ride wonderfully - a sure-footed, fast and comfortable winter tyre. Here are a couple of photos:
http://www.wooljersey.com/
http://www.wooljersey.com/
The 27mm version is quite a bit wider than the 27mm version of the Vittoria Pave - looking closer to 30mm.
They'd look good on 60's and earlier bikes.
I've had very friendly and helpful service from the Dugast web site via email after ordering online. They ship the tyres and then ask for payment via bank transfer once the tyres have been delivered.
More photos of the 1975 Eisentraut Limited (currently wearing a temporary mish-mash of components) are here:
http://www.wooljersey.com/
Wyndham Pulman-Jones
Girton, Cambs., UK.