YYJGuy,
Welcome to FlyerTalk!
It probably doesn't help you much, but you could buy half HP and half US to get you where you need to go. Every once in a while, a split ticket like this will come up cheap, if you don't mind multiple connections. Expedia will often do this automatically on out of the way places.
Even if you have to credit to HP and US for now, the programs will merge soon enough that the miles will be reunited.