Until you find a suitable original-equipment part, be aware that practically all the 6-lug Japanese truck wheels have the same bolt spacing. Toyota, Nissan, Mitsubishi and Mazda all use a 6-lug wheel that's a clone of Chevy. Wonder how that happened?
On the "US-made" side, Ford Courier, Dodge Ram 50, and Chevy LUV are the American-badged versions of the imports. Same truck, different trim!
Jerry