Someone to Touch Up Cork Tiles?

We had cork tiles put down in our 7×9 kitchen about 5 years ago (bought from someone on craigslist who had leftover from his reno so not sure where they originated) and need to have them re-sealed. We had our contractor originally only put half the recommended coats on top because we didn’t want a shiny finish and it looked so good with a more matte finish. But as we were warned would happen, the finish has started to wear off and the tiles are now showing some wear – lighter spots around the seams, especially in front of the sink, where we obviously stand a lot – as shown in the pic.

Can anyone recommend someone for coating/sealing the existing tiles and possibly staining the small areas that are showing wear? We can’t replace the worn tiles since it would be hard to match without knowing the original source, but I’m guessing there’s a way to at least make them look better than they currently do.