Zefal makes a pump accessory called Z-Hoze. I've been using one of these for a few years. The valve end can be reversed for Schrader or Presta. The other end plugs into a frame pump Presta head.

Zefal - Z-HOZE - ZEFAL

Jenson has them on sale right now for $7.99

How you carry it is a consideration though, if you don't have a big enough bag. I secure it across the top of the seat bag. I made a loop with velcro that goes through the strap loop on the top of the bag to run the Z-Hoze through, then it's bent down to further secure in the bag's velcro strap around the seat post.



A simpler, low-tech option is to count the number of pumps you need to inflate your tire to a desired PSI.