I've never seen it in a jow, either.
I've been thinking, though, that jows are a pretty universal liniment. I mean, every traditional culture must have its own jow. I say must, because I can't think of any culture that hasn't addressed the problem of trauma through herbs.
I think traditional crossovers should automatically be considered "modern" jows. Say I take an herb indigenous to North America and add it to a Chinese jow. There is no reason why I shouldn't be able to do this, but I would have to accept the fact that there is no way my jow could be considered traditional.
It'd be interesting to see a list of international dit da jow recipes, for both comparative and combinative research.
"It is the peculiar quality of a fool to perceive the faults of others and to forget his own." -Cicero