WTB Gossamer Gear Murmur -or- MLD Burn -or- Zpacks Zero -or- sub 1lb Pack

My wife has to get off the trail due to leg pain that hasn't ceased for the past 400 miles.

I'm in a rough situation, gear wise, because I only have a kit that's geared toward 2P loads. I have a heavier backpack (I carry the cook kit and shelter for two). I'm looking for a lighter pack fast, so I can get back on the trail with a lighter kit and keep raising money for charity.

http://www.hikefor.com/The_Wandering_Kadings/PCT/2015

Any sub-16oz pack with 30-50 liters would fit the bill. Thanks in advance.