Thanks for the tips!
I actually experimented with regular old "pier 1/cost plus" bamboo, approx. 1.5". I know it's weak compared to rattan, and much more succeptible to splitting. It is however, pretty cheap and wrapped in pipe insulation and duct tape, it holds up pretty well, and is light weight. I'll eventually spring for some "real" padded sticks if my interest in this art/sport/aggro release continues to deepen. Meantime, I'll give your method some thought and, if time/materials permit, a try. Thanks.