Well, once you've drunk the whisky, you simply top up the barrel with the aforementioned urine, but to fool the bosses back on Earth, you squeeze a few of the alcohol cleaning wipes into the mixture, and add in a bit of rubber, plus the previously present wood chips.
This should give a rough approximation of Ardbeg anyway. *Ahem!* [ducks and runs for cover]
Ardbeg is even peatier than Laphroaig, and is a bit on the TCP side for my tastes.