Does anyone know where I can find a white dial Rolex GMT?

When PAN-AM had Rolex make the GMT watch, they got some of them with white dials, but I don't think Rolex made any more after that. Does anybody know how much they are worth? I'm not interested in a fake or in an Explorer.|||Such watch is collectible, look online auction news of Antiquorum, eBay, Amazon, Butterfield %26amp; Butterfield, etc., Rolexes have high value, is king of auctions of entry level luxury brands, Patek Philippe is king of highest price brands.