Hi gunmonk,
You didn't state whether you were looking to purchase supplies or just locate a supplier. Personally, I shy away from purchasing my supplies on-line. I would prefer to establish relationships with local distributers. Over time they will get a feel for what you like and don't like. Also, If you can find a good supplier with a good technical department, it may help you out of a jam on occasion when you just can't find the answer. I would think also, if you had a need to return supplies or have a mixup in an order it's a lot easier (and cheaper) to return.