CoreyRYour Google-fu must be mighty indeed. Best I could find was $17 shipped. Sure you're looking at carbon steel Companion MG HDs and not stainless steel Companion MGs? The Companion Heavy Duty costs a little more than the regular Companion.
CoreyRthe one on amazon that's a buck cheaper is just a SS blade. this is the heavy duty model. Assuming you have prime, this is $1.71 cheaper than amazon.