I honestly believe that the materials you listed are equal to the task - it even could be that many of them are the same stuff sold under different trade names. I would not lose sleep over the brand choice - you can even try tying a few nymphs with shellback from a strip of a heavy duty plastic bag you cut yourself, thus asserting your independence on the fish tackle industry
In the old times (before Internet and open borders) people over here used all kinds of stuff for the shell back - surgical gloves, latex condoms, sausage skin, dried mackerel skin to name but a few - and boy did they catch fish!