You can use pretty much any old water sound pot or pan for a vessel sink. (If you are really brave you can try it with a large Old Porcelain washing bowl- but you do risk it cracking.) I made Copper vessel Sink quite by accident 9 years ago when I was redoing my house after we had a big fire. You see, I had forgotten to order the sink I wanted for the downstairs powder room, and the contractor was ready to install it!
Yikes- I freaked out for about a second, and then remembered a picture I had seen in a Log Home magazine of a simple zinc bucket sink... LOL So I handed it to the contractor and said- "Here it is- just drill a hole in it please". He looked at me in total shock and said "Uh, we can't do that". I looked over at the plumber who by now was loving this job because of all of the unconventional things I was making them do
"YES we can" he said and took the sink into the back to drill it! I had no base cabinet- I totally dislike "normal" base cabinets. I had a chunk of rough sawn wood left over from my fireplace mantle and had the guys create a base for my bucket sink out of that.
It is affixed very simply to the wall on one side, the other to a free standing "leg made from a stump sawed in half. There is a hole drilled thru the base and the bucket is drilled to the size opening needed for the drain you have purchased. It is really simple. You can use copper buckets, zinc washtubs, zinc coal buckets- use your imagination!