Thanks to all that have replied and provided information on what is available on the second hand market for Pacemaker Cabooses! The brown woodside NYC caboose I currently have is a Lionel produced in 1986, Road #6907, there is no tag or stamping on the (orange) box indicating the item number. It is one of only 2 Lionel items I own, so not familiar enough to know the item number.
I have been buying a lot of Weaver rolling stock, but the Pacemaker they made based on their NE caboose was just too far off the mark for me. Same can be said for the MTH Bay Window Version.