Keysy is a new product that can backup up to four RFID access credentials into a small keyfob form factor. It will consolidate them all on your keychain so you can leave the originals at home and avoid having to pay costly replacement fees should you lose one.
Product manual: https://tinylabs.io/wp-content/uploads/2018/09/keysy_manual.pdf
Compatibility list: https://tinylabs.io/keysy/keysy-compatibility/
Hak5 RFID duplication video: https://www.youtube.com/watch?v=IHyM7o-OVqA