This is the only place showing a pic of the new probe. It's possible other places haven't updated their websites. Since BRS and Neptune are kind of one in the same, I can't imagine that they don't have it, unless they are still trying to clear out the old version.
Neptune Systems manufactures their own temperature probes in-house. Why? Because they saw the level of early failures due to using off-the-shelf temperature probes like those used in stand-alone digital thermometers as well as those used by other aquarium controllers. These probes often fail...