There's one on 192, about two blocks from the intersection with 535. Maybe 5 minutes beyond the Super Wal-Mart, but well worth the drive.
From Caribe Royale, take a right out of the resort, then a left at the first light (535). Continue all the way down, past the Wal-Mart and some strip malls, and turn left onto 192 (where 535 dead ends into some hotels). Super Target will be on your left at the next light.
This seems to come up a lot, so just so you know, Super Targets are not open 24 hours-a-day; IIRC, it closes at 10:00.