I know the armored company article is on the UK site both under Chapter Approved and on the Imperial Guard page at the bottom.
I also have seen it on the US page but had to look for it once I got to the Chapter Approved area. It may be in one of those more links on the imperial guard page.
If you don't play an Armored company it is still a great resource for building some of the models, like salamanders and some of Russ varients. It is also in the WD 294.
Hope you find it because it is a good resource.