Since the mats have a diagonal square pattern, as do the A3 mats of the same generation, and the A3 mats appear to be widely available on eBay. When mine is finally too worn, I have it in mind to buy a pair of A3 front mats and to cut out the worn section, and cut a similar sized section from the new A3 mat; then somehow (probably carpet tape on the back) effect a repair.
Having said all of that, a search on eBay makes me think that my fallback position is flawed: all of the A3 mats available today are quite unlike my A2 mats. Back to the drawing board ...
Andrew