I wanted to add a back up light to the tender of my 2-8-0 and I was planning to do so by ordering a brass back up light and a lens.  However, this would involve having to struggle with getting a light to work with the brass back up light.  While viewing the Bachmann website I noticed I can order tender shells and this has led me to some possible alternatives. 

Do any of you know if one of the tender shells with a back up light will fit on the 2-8-0 tender frame?  In particular, some of the tenders used on the 2-10-0 or the 2-10-2 look particularly appropriate, but there is no dimensional data on the Bachman web site for me to compare with the tender that came with the 2-8-0.  I measure the 2-8-0 tender to be an HO scale 28.5 feet long and 9.75 feet wide.  What do the tenders for the 2-10-0 and 2-10-2 measure?

Another alternative would just be to swap tenders.  For instance, I could order the 2-10-0 tender shell and frame and substitute them for the tender that came with the 2-8-0.  From other postings I see it is important to also move over the 2-8-0 circuit board if I try this approach.  Are there any other issues I should be concerned with if I try this alternative?

Lastly, from the exploded diagrams on the Bachmann website, I see the parts and their numbers for various back up lights.  However, the Bachmann webpage does not list these parts being available online.  Do you know if it is still possible to order them?  For example, back up light no. 83801 from the 2-10-2 or no. 84302 for the 2-10-0 would both work for me.

I welcome any suggestions or advice.  Thanks.