I'm not sure if this is the current version of it, but it is something:
http://tabletopgeeks.com/lotr-downloads/wp-content/downloads/lotr/LotR-bcrulesredux.pdf
Edit: It seems that some things are missing from that pdf. I'll throw up a few other links, and continue to update the post as I find more information.
The old rules can be found here. This may be worth having a look at as it contains the battle company roster sheet, which helps you keep track of experience.
http://www.scribd.com/doc/6785018/Lotr-Strategy-Battle-Game-Battle-Companies
Additional equipment options are here, for those who want more variety in their games:
http://www.tabletopgeeks.com/wp-content/downloads/lotr/LotR-bcequipment.pdf
I have completed a Microsoft Excel version of the roster sheet. I find this a little easier than doing the book keeping on paper. If you are interested in getting a copy, PM me.
I still can't find the lists for the individual companies themselves, but I do have them on my old computer, which is a few thousand kilometres from here. If you don't mind waiting a month, I may be able to track the file down. However, there is no reason you can't just use the old version's army rules, while ignoring their special rules.