I bought Chubby's sink at a building surplus supply. A bar sink with faucet for $10.00
I was later able to pick up a mini double bowl stainless and a small stainless bathroom sink out of a truck camper that was being scrapped. The guyt was so excited after seeing my tear pictures ( Yes I carry them like a proud papa) That he gave me both of them.
If you have limited counter space and are reluctant to give it up to a sink under mount the sink itsself and cut a filler board to insert in the sink area when not using it.