Thank you for the vineyard/label names that you have contacted Julirama - I was looking for a list! And it does appear this will be a maker by maker search/ inquiry -
The wine maker that I got the information from is American - NAPA Valley (J Lohr), and I understood that it was new and reconditioned barrels (they add new oak panels for flavor as well as repair). She advised to seek wine makers that use a stainless steel fermentation process - I also just found reference to white wines using new oak barrels sealed with flour paste.
I will start and edit a GLUTEN FREE WINE list here: