world market was a decent one for 3 bucks its just not as heavy or deep as i'd like but it works, also the flute collection have heavy deep bowled spoons at http://www.williams-sonoma.com/produc... also check j.b prince
From JB Prince, you could get the Gray Kunz spoon which is a pretty popular spoon with cooks and chefs. With two of these, you could make quenelles although they're expensive- $10 each and another $10 for shipping.
I don't believe there's a specific spoon for it. Any large dinner spoon can make a quenelle, just takes a little practice. You could experiment with different shaped spoons, rounder/narrower, to find one that you prefer.