Sorry for your loss! Hopefully the cart will be recovered. After reading about several cart thefts, I purchased a GPS tracker off Amazon. I paid around $40.00 for the tracker and magnetic case and about $100.00/year for the tracking service. Every time the cart moves both my wife and I receive notices on our phones. The tracker is hidden underneath the cart so not noticeable by would be thief. The GPS battery requires recharging about every 3 weeks which takes a about 2-3 hours. It's not a perfect solution but allows the police track down the pound scum if stolen. The link below is type I purchased.
Amazon.com