When I buy something like this I do it by the case. These were purchased some time ago.
There is a video on Whip City Wrencher showing the classic Motorcraft FL500S replacement with fabric end caps
The classic FL500S is still being sold. The other version was a stop-gap during supply chain issues. The classic FL500S however has been shown to have sloppy black potting material on the metal end caps that can come loose during use.