Let me add that my first of several TS55 was purchased from Eagle Tools of Los Angeles in January 2006.
I have not needed to replace the base plate on any of my TS55. The oldest is the one I now use as the standard against which all of my TS saws are adjusted for toe-in and spacing from the rail splinter guard. Still, for over 4 years that was my primary TS plunge saw. There has been no significant wear of the gibb pads.
Let me add that I do not fabricate solid surface materials. I have done so in Festool End User SS class, but having been warned by Steve Bace in advance, I used the TS55 provided in class. I am sure that solid surface fabricators become very good at changing the bases of their TS saws.