Easy!Some Half inch copper tubing, 4 90 degree elbows, 2 caps, and 1 regular threaded hook.
I measured out the width of the inside bottom, and measured the beginning of the zipper to the bottom. I used the measurements and 1 90degree elbow to make the piece the bag sits on.
Then it was just setting up a U joint with 2x 90 elbows, to bring the tubing out and up.
Then one more 90 to bring it over again and found the center of gravity with a test fit. Mark the center, and thread the hook in.
Ill be making another, and will create a more detailed write up. All in all materials were ~$15. As apposed to $20-$30 if I bought one. Although, if you dont have a soldering iron, copper flux, and solder, it'l be easier to buy one.