RickO - Would you (or anyone else on this Forum) happen to know the 'individual' item number for this particular engine? Not the 'set' number.
I realize this may be diifficult to answer (since you don't own the set) and in my experience the Lionel Price and Rarity Guides don't normally list the individual item numbers of a set. However, if someone is able to provide the specific item number of this particular engine it may assist in your quest to locate one. Just a thought.
Good Luck!