i have purchased and used jow made by one of our forum lurkers.
plumdragon.
i had developed some tendon issues in my wrists, got in touch with him, he threw in some extra herb(s) for my specific ailment and sent it out. got it quick and in a weeks time the problem i had been having for weeks was gone.
just ordered up a bottle of his 1+ year aged jow and am looking forward to using it.
check his shop out. he has iron palm and regular bruise liniment.
http://www.plumdragonherbs.com/catalog/quality.php