I don't know which number it was, but an SD60m repainted in the new boxcar scheme was on Saturdays run from btw Fresh Pond & Oak Point. It was leading on the oak point bound run, around 1:30 or 2pm. It was paired with an sd-40-2. I'm pretty sure I saw either the same engine or another sd60m in the new boxcar paint sometime earlier last week too. (I usually see this train coming back from fresh pond every weekday morning, the novelty of taking photos of it wore off years ago).
So there's definitely one making it's way up & down the hudson. I'm not sure how often (if ever) the engines equipped & assigned to the hudson go elsewhere. If it has wandered off, It's likely to come back.