I found this vendor (Manhattan Wardrobe Supply) through a comment by Joan on The Welcome Mat. She gave this link to a vendor who sells white enamel dye pots. My own (which I purchased years ago in an antique booth) has just started to develop pin pricks of wear through the enamel, so I must purchase a new pot immediately. I haven't had any luck finding one, so I am very happy to find this vendor. I am going to put the information on my sidebar under "Vendors" for future reference.