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On my list of the top things I have missed since going gf over a year ago is
malt vinegar - just to splash on fried fish.  I just tried some organic rice
malt vinegar I ordered from the Gold Mine Natural Food Co (800-475-3663).  It
was good but kind of pricy, about $10 for 16 oz.  They assured me that the
only ingredients were rice and water.  I had no bad reaction to using it.  I
have no connection or financial interest in this company, just a satisifed
customer.
   Barb in Springfield, OH, USA