In response to my own question above about where to get a 29/44 tooth double crankset, I found the 'Stronglight Oxale Two'. See the manufacturer's page
here, it is for sale
here and
here for about US$160, it got a very positive review from
bikeradar.com, and it needs an ISIS bottom bracket.
The only problem with this crankset is that it is officially made for a 9-speed chain. I assume that it wouldn't be a problem running a 10-speed chain on it, but does anyone have an opinion/info/experience regarding this?
Lastly, which front derailleur do other people who have similar size chainrings use? I'm open to anything from any manufacturer because I use a downtube shifter for the front derailleur.