Lionel calls the new locomotive the Vision Legacy, my apologies. The Vision Legacy Big Boy is a Made To Order locomotive, and Lionel lists very few parts available for it as yet. http://www.lionel.com/CustomerService/ReplacementParts/index.cfm?doAction=productPartFilter&number=6-11449&productID=890ad571-9e99-4658-804d-1e1cac13a329 I would guess that for a limited production locomotive such as this, that replacement parts will be in short supply.

A call to Lionel to inquire if the newer Vision Line pilot, if it becomes available as a replacement part,  is interchangeable on the older Legacy Big Boy, would save a lot of speculation.

Did Lionel inform you if the part you are looking for will be available in the future?

Larry