I used kitchen-cabinet-hardware.com. Best prices I could find for the pulls I wanted, and a good policy for ordering samples. They also give 'points' for your purchase - the points I got for my original order were enough to cover the cost of some extra pulls I ordered later for my pantry. I would highly recommend them.

Here is a link that might be useful: Kitchen-Cabinet- Hardware.com

try www.myknobs.com They have a ton of options in all different price ranges.

lee valley hardware. online catalog - or they'll send you a hard copy.

I used
yourhomesupply.com and was totally pleased.

and others have used
http://ahturf.com/store/index.php?route=product/category&path=5

both had excellent prices and service.

Here is a link that might be useful: your home supply

I used my knobs as well. This was for the pulls. They were great to deal with! If you're looking for hinges, I did a different place; I can't remember the name of it, but I can look it up if that's what you need (I was very happy and it was the cheapest I found for blum soft close and european hinges).

I got my Liberty hardware for the best price on Ebay. If you know specifically what you want, then do an Ebay search. It ended up that I bought it from an online retailer that charged 1.50 more per pull from their site!