Were you using a Velcro strap around the frame tube and pump? If not, get one. The peg is not enough to keep it in place... In spite of what the literature says. I dropped my old HPX several times before I finally learned that lesson.

As far as replacements, any of the road frame-fit pumps made by Topeak, Zefal, Blackburn, and now Park tools should work fine for you. The Park model is size adjustable and received a good review in Cycling Plus. I am not aware of any frame fit pumps that have a guage. My favorite frame pump is Topeak's Road Morph, but that will not fit into the pegs... But it does have a guage.