I got a delivery from
Brouwland in Belgium last week.
A small bottle of "Oak-a-Vin", which is an oak extract that can be added to wines, spirits, etc. A bottle of Ebsloh Distipur, a crystaline substance (don't actually know what it is) that you add to distillate to remove the harsh "new spirits" flavour, and some apple and some calvados essence/extract to try.
I've yet to try any of them but I'll post how I get on.
The only downside being that because Brouwland is in Belgium, it's not so cheap to pay in euros at the moment. I might end up getting bigger quantities if I do a "baccy run"!
Closer to the actual thread topic, I found, on thursday, a place that sells barrels. Proper French Oak barrels. The only downside being that they are wine barrels, so not toasted internally, they've been used for either burgundy or bordeaux and therefore stained red inside, and they're "industry standard" size a.k.a. 225 litre/50 gallon.
Apart from that, they'd be brilliant. They're only 12 months old and look pretty much brand new externally - the wood being very, very clean.
At about £60 each, that's a hell of a lot cheaper than paying the 550 or so euros for new ones (if you could find a french cooper in the first place

).