Steph,
Just what environment are you looking to use this in? There might be other solutions than a strap. I have a Peak Design Capture clip on the shoulder strap of my small bag - lowenpro photorunner. I use the shoulder strap approach across my left shoulder and the bag on my right hip. (slope shouldered football stuff, I can't keep shoulder strap on unless my neck is in the way). I have it angled, etc so that the camera weight is on the clip and the lens rests on the top of the bag. If I am in real dicey area - over water, etc. I use a handstap threaded through the quick release for the Peak Design.

It takes a little jiggering around but it is a handy way to take a small bag keep your hands free, move the weight to a broad shoulder strap, etc.

My two pennies worth.

Mike