the feisol CM1471R is an excellent monopod. i have used them for the past 6 years or so since they came out. no little legs on a MP setup will truely support a camera assy really stable
Check this out. Another member recommended it to me. I ended not purchasing this because it did not fit my needs but it sounds like what you are looking for as it is a tripod with a built in monopod.
It's my understanding that when the little support legs are extended the amount of weight it's rated to hold comes way down -- what that means to me is if I have a camera and lens the monopod will easily support it probably won't if you extend the little legs.