I did a quick search and came up with '92-'94 Ranger alternator brackets. Gotta get the tensioner also. Here's one that's mounted in a Mustang. Big 'ol honkin ugly thing, if you ask me! But hey, it works!
The alternator you'll need is the one in the middle. Note the mounting bolts offset 90* from the face.

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Trust in the Lord with all your heart and lean not on your own understanding.
Proverbs 3:5
1989 Mustang convertible w/built and turbo'd 2.3.