WTB: 0 Degree Sleeping Bag - lightweight synthetic or down

Looking for a 0 degreeish men's bag that's packable and light (has to be under 4 pounds). Could be a high-end synthetic (like the MH Hyperlamina Torch) or a down bag. I can't spend a fortune, so Western Mountaineering, Feathered Friends, and the other small-batch manufacturers are, unfortunately, probably out of the question. LH zip or RH zip would both be okay, but I'd strongly prefer a long/tall.

Anyone have anything that fits the bill?