They are great knives too. They use the same steel as the Swamp Rats (SR101, which is 52100 ball bearing steel with an excellent proprietary heat treat). The designs are different from the Swamp Rats, and the handles are resiprene C (very comfortable, and nearly indestructible) instead of micarta. They are made by Busse group, same as Busse Combat and Swamp Rat, and they come with the same unconditional lifetime guarantee. You break it, they give you a new one. That even covers the handles, and the warranty is transferable. It is for the life of the knife, not the owner.
In the size you are looking at, I'd recommend the 511, the Safety Mutt, or the Mud Mutt from their current lineup, or one in a similar size that has been discontinued. They're out there. Check the exchange or the bay. You'll find one, available NOW, with no wait.
When you buy something, post an update with some pics. Good luck man!