Resurrecting an old thread, I too lament the lack of a peg to put a Zefal HpX pump on the frame of my RST.
I have used a Blackburn mini-pump for some time which inflates tyres well enough, but being so short and with the direct-fit to the valve it seems harder to hold it steady while pumping (compared to a full size HpX) therefore I suspect it puts undue stress on the valve and could potentially damage the valve connection on the tube if due care isn't applied to the process.
So, about a year or so ago I saw this review:-http://www.bikeradar.com/gear/category/tools/cycling-tools/mini-pump/product/review-lezyne-micro-floor-drive-hp-pump11-45235
I was impressed by the notion that the tube eliminates pressure on the valve and bought the version with the built-in gauge. While it may be a tad large to affix to a bottle cage mount it sits fine in my saddle bag. This is the first and as yet only Lezyne (Engineered Design!) product I have ever owned and it is indeed an impressive piece of kit, It worked well when I tested it, I haven't used it in anger yet and hopefully I won't have to use it much in future.
I note from this thread that Julian beat me to the mini track pump route by a few years, it's a pity I hadn't spotted that sooner.