Damien Howarth Is the best cooper in Australia, he makes spirit barrels of every size charred to your liking, posts Aus wide, check him on fb or go direct to Home Distillers Australia. He also sells boka/pot stills with keg boilers etc. It costs about $15 to make a TPW 50l wash which will give you 5l of spirit @ 92%, that will fill a 10l barrel (add 5l of water to bring down to 46%) & it will be good to drink in 8weeks.