The non-standard SHVYs are Brigade Models' Neo-Sov Mammonts:
http://www.brigademodels.co.uk/6mmSF...F300-1202.html
Brigade Models and Alternative Armies are both great companies to deal with, even giving shipping nowadays (to North America from Britain generally). Brigade in particular has a full enough line-up to cover the Ogreverse, though one will have to cross national lines to get the full panoply of forces since--in general--each nationality uses a specific motive type. (The Poles are a notablde exception.)
Edit: great AARs; I hope you all are still playing! Thanks for posting them!