Is there replacement silver plates for the vector 3. The plate where the cleat makes contact. These seem to wear out rather fast and it would be good to have a replacement as a back up!
It's not listed in the replacement parts section of the website so if it is available you'd probably have to get it directly from Garmin Support. Though I've been using my Vector 3 for over a year now and I don't notice any unusual wear on that part so it may not be considered a wear item. If yours is wearing out you should definitely give support a call and see if they can help you out.