Hi. I don't know if you're still looking or not, but you should be able to get modern touring rims in 40 hole. I have Velocity Dyad rims on my fixed gear (mine are 36 hole), but I seem to recall that they were also made in 40 hole for touring applications. They are very durable, too!

Yes, here we go:
http://www.velocityusa.com/

You'll have to click on Road rims and scroll a little bit. Good luck!