Nope.
It seems silly that you can't get a knife WITHOUT something. Just don't put the @$!#$! coating on! What's so difficult about that?
The answer is nothing except that when your knife's blade arrives for assembly, it'll be rejected as defective and sent back for coating. To get one through without coating, they'd have to tell everyone involved that this ONE piece is coming through without coating and that it's ok. Then, they'd have to keep track of that ONE piece so that it didn't accidentally get shipped to someone else.
Oh, and if you ever sent it back for sharpening, the Lifesharp folks would say, "Oh my! The coating has worn completely off! The client will appreciate it if we send that out and get it recoated for him."
If you want a knife made to your exact specifications, there are many custom makers who will be only to happy to make you a very Nimravus-like knife with no coating. In fact, it's not such a complex knife that it should cost that much more than a Benchmade Nimravus would.
What you have to ask is: how much is it worth to you to have such a knife without coating. The Nimravus retails for about $125. You can probably get a similar fixed-blade knife made very nicely for about $250. That's just $125 more. If the knife will last you five years, then that's just $25 per year, about seven cents per day, more to own the exact knife you want.