First, thanks to everyone who helped. We received a phone call at 4:15 am on Saturday (yes, AM), from the police to inform us that our cart had been found. When we arrived at the station around 10 Saturday morning, we were told "there's no reason to do a police report, it is only missing the wheel well covers". We insisted on a report anyway. After the report was finished, a closer examination, (by us, not the police), revealed that not only were the wheel well covers taken, but so was the transmission, the windshield, the mirrors, and all the movable parts under the cart. For some unknown reason, the batteries were still there. The seats were filthy, as they apparently removed the parts and then laid them up on the white seats. We are quite sure this was a "professional" job, because the Yamaha keys are different than most of the ones around the island, whoever took it must have picked it out purposely for the particular parts, the person who removed the transmission, etc., obviously knew what they were doing. We are assuming that it was dismantled somewhere around Marina's, and then pushed down the incline next to Xanadu, landing in the bush.
If anyone knows of, hears of, or sees a Yamaha cart new on the street, let us know as we suspect that someone has taken these parts to revive a cart.