Finally, I have a 15" spare wheel. When, I bought my 88 Disco 1, it came with 5 brand new 15" tires. (33x12.5x15) The spare tire did not have a wheel.
I found out that a 5 x 6.5 bolt pattern is a pain to find. Pro Comp discontinued their wheel. After numerous calls I finally found a wheel at Gulf Coast Rover in Texas.
It is a American Racing Wheel Black Nugget 15 x 8. It even looks like my other wheels.