How do I find a stage's original .rel?

[TNO132]

Quick question to anyone willing to answer, how would I find what stage was originally based off of? I.E. how do I know what .rel to use for the stage? I did a punch of reorganizing with the stage editor and got my SSS to finally matchup my stage.pacs, however I forgot to move the .rels. I am currently using the stage expansion pack which is mostly made up of final destination .rels but there are a few that are still unaccounted for, help?

[raverrebel]

open the .pac with brawlbox.
normally you should see the name of the stage it goes over then.