Welcome to Smogon ^_^snip
If all you are really after is your SID, then the quickest method to finding it would be to import a Pokemon with your OT into a Gen 6 game and check it there (i.e. with PKHeX). If you are unable to do this, I would be happy to check it for you. :)
You can check which seed you get in the RNG Reporter with its Seed Finder/Generator tool (4th Gen Tools > Find Seed by IVs, for example). You would need to know the IVs for a random Pokemon you catch, or just its stats if it is a high enough level (say 45-50+).
There is also a tool in the RNG Reporter that can calculate the seed/PID from a Pokemon's IVs (4th gen tools > Calculate PID from IVs). It will accomplish the same thing as X_Act's tool.
Or, if you are more technically inclined and don't like any of the above options, you can calculate the location of 2 of your Munchlax trees manually with only your TID (as described here).