Originally Posted by
rollinalong

I jerry-rigged a piece of 3/16" aluminum rod from home depot. Heated it up over the kitchen stove and bent it around a rolling pin. The rod loops under the stem then hangs cantilevered over the bars. I use an old camera bag as my handlebar bag, but my bag is not as tall as yours. total cost less than $5
Rhode gear used to have a mounting system that worked similar to that, looping around the stem and bars, with a short bungee that wrapped under the head tube to keep it from bouncing. The bag then had a bracket that locked into the tubing mount. I thought the system worked pretty well. wish I still had that bag. Most of the bags I've seen of late use clamps that need to be very tight on the bars to keep the bag from drooping.