I live in wine country and there is a small company nearby that sells wine making supplies to the wineries. They take back the used French oak barrels and repurpose the staves into tea light holders and the tops and bottoms into cheese boards. I dropped by one time to ask if they had any off cuts and was shown their rather larger burn pile.

I was able to fill a large contractor garbage bag with red wine soaked French oak. They make great smoke in my Weber charcoal barbecue.