I don't know if they are available, but if they were, I would buy one! It is good to have our babies microchipped, but in the incident that somehow they ran out the door or something (or other freak accident), it is the responsibility of the person who finds them to check for the microchip. If they give him/her to SPCA or another agency, then they will check. The unknown scares me and there aren't many people I trust with my Mia! Let me know if you find a microchip with GPS though!