JW pole lightweight? At 480g?
Bearbones is one brand I've heard is good. Carbon fibre i believe. MSR is aluminium and adjustable to a small extent. I think that's useful to get that last bit of tightness to the pitch, perhaps.
Look for American ultralight backpacking companies if you're willing to order from there. IIRC there's some decent companies out there. Some supply ultralightoutdoors.co uk others don't supply retailers over here.
Anti- Gravity Gear, Tarptent and six moon designs are some companies off the top of my head.