Neil,
Made the Can out of Basswood, get it at the local saw mill, last time I was there spent $45. and have enough to make 6-7 decoys.
The cork you can buy in big sheets that cost around $75 I think thats for the 5" thick stuff.
Go to Theduckblind.com and talk to Willy, I think they sell a starter kit to.
Once you start carving it becomes VERY ADICTIVE and then all you want to do is make more decoys.
Craig