They probably had a heckuva ordeal getting the rights from J Edgar Burroughs the first time, and didn't want to go through it all again. Or maybe they couldn't get Brian Blessed to redo the voice again, and weren't satisfied enough with a clone.
I don't know for certain, though.
Gum-Gum Gummi Ship: Blueprint Active! Straw Hat Pirates need a new Merry Go, c'mere Sora! Lend us your spacecraft!