Make your own, but avoid leather and use aluminum or stainless steel with a rubber backing. You must hold your tank tightly, with ZERO movement, or vibration will create friction between frame and tank and ultimately a leak. Buckles allow for the proper tension on the strap to hold it fast.
Clubman's sells tank strap kits and Manx style buckles. http://www.clubmanracing.com/nortonfeatherbed.php
Unity Equipe has tank straps and buckles too. http://www.unityequipe.com/html/home.html
If you make one, post your results.
