Where's the best to buy a mouthpeice for my sax?

I own a lovely Conn stencil C Melody sax myself. I tried many types of mouthpieces ranging from the C Melody mpc, alto and tenor. A vintage C Melody mouthpiece will give you an 'ancient' sound to your horn. It doesn't have volume in it. A rubber/plastic alto mouthpiece didn't appeal to me. A tenor mpc soundded great but a lot of intonation problem. However a metal alto mouthpiece did the trick. Now it sounds like an expensive tenor sax, with great volume. I own a Yani soprano, a Martin Tenor and a Buescher Alto BUT I spend more time on my C-Melody. I love it... not too heavy, not too big yet it screams like my tenor. Happy hunting!