. . . great idea, Tom! . . . got me thinking a bit further "outside the box" and I thought I'd try some fabric shops here. First one I called actually knew what I was talking about, very encouraging I might add, but unfortunately no longer carried it. Asked them where I might find something similar and they said to try another fabric shop in town, about which I didn't know.
Called them up and, sure enough, they had a whole variety of widths, colors and designs, from frilly/lacy to stout double-weave, just what I needed. Found some 1" wide olive-drab double-weave remarkably like the 40-year old original . . . at only $1.49 a yard!!