eBay Seller nopal_verde sells a variety of oak barrels in a range of sizes. Free engraving is available on some offerings. These ship from Mexico, but shipping charges are generally reasonable to the US. They also ship worldwide.
Check the seller’s eBay listings for current price, description and availability.
The smaller sizes could be dual purpose. You could mature a whiskey in it first. After that you have a used whiskey barrel you can use to age a barrel stout or other homebrew.
Check Out Our Resource Post on Sourcing Barrels…
Price, promotions and availability can change quickly. Check the product page for current price, description and availability. rp:ebaynopalverdebarrels tag:barrelkp