I found a pair that appear to be almost direct copies in many ways of the GSG9's, but made by Bates. I have a pair of Bates ICBs that I use for rucking, and the quality is excellent, especially considering the comparitively low price. I'm not sure about these, but my Bates have always been good to me.
http://www.discountedboots.com/site/604790/product/2145