metal spots (conchos) for leather/vynil book covers

Looking for someone to make metal spots as a decoration for leather or vynil book covers. spots should be about 1/2 to 3/4 inch and about 1/16 of an inch thick. Four diferent desighs and four diferent colors, silver, gold, copper and black. Product has already been desighed and I have samples of finish products. Have a high demand for this cover, so order will be small in the beggining,but Ill be increasing frecuency and amount of orders as the company expands.