Brad,
Technically, 95 1/2 up Explorers have disc brakes. I have seen an early 95 Sport with rear drums. Anyway, I would try to find a setup from a 97 to 00 explorer because the design seemed to be more refined from the 95-96 design. I performed this swap on my 94 sport for $150 for everything. See the writeups on this site about the rear disc swap.
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Brett Grooms
94 Explorer Sport