I just use these... Extendable Telescopic Grip Handheld Pole Monopod For Digital Camera Camcorder | eBay
find them for a few bucks all over ebay...
light, fast collapse/extend (no locking crap), extend to a meter, collapse to 20cm which fits in every inside pocket jacket ive ever used with camera attached. Can attach a small carabiner to the hand end and then to your jacket so if it does fall out it should be safe.
so cheap you can buy a few at a time so if it breaks or you leave it somewhere no matter