I have the midsize Staff bag and also would love to find a dual strap to fit it. The single strap just clips on and off so it seems like it would be pretty simple to change out the strap.

I checked on line and there a double straps on there for sale but not for the single strap bags. I have a cart bag and the strap is a clip on and the double straps have no clips. I do not think that these bags are designed to carry (my opinion). I use my strictly on the golf cart or on my Clicgear push cart. I honestly think they would be too heavy and awkward to carry by design. Those double straps are also designed to add balance to the bag. Good luck.

I would also like to know if this is possible!