The chances of finding any used ones with the black coating intact are practically nil. You can strip the rotting coating with a razor blade, but be careful at the edges since the seals also overlap the edge slightly.
The coating deteriorates fairly rapidly in sunlight - another reason to use a car cover.
The first part number (72410-S3Y-003) shows availability from multiple Honda parts dealers, at least in this universe. It looks like one of the second part number showed up (in Japan) on eBay recently, so there might be a few more to be found.