You can just pick up nylon web strapping and the fittings at most fabric stores. Also Walmart's craft and sewing dept. I've had to jerry-rig a lot of stuff for camping and hiking and I've used that stuff from 3/4 inch to 2 1/2 inch and found that all of the adjusters and buckles are readily available and cheap. The 3/4 might be just the thing since it's a bit wider and will even out the weight nicely.

Best

AA