Follow this link and scroll down a little past halfway and forum member JeffinPA has some straps for sale. They are the flat stock with the slots/holes in them.
http://onlycubcadets.com/
Link didn't work ?? Go to the For Sale section and on page one he has an ad for WF Frankensien bolts with Jamnuts.
I see you both are in PA. , maybe he is close by.