Anyone know where I can get solid horns? (who drops them, and where are they?

For that matter, I'm trying to gather loot, to up my weapons. I've got the other ingredients for the Leering Blade (dark crystals and demon tails), but in this case I can't seem to find solid horns.

I'm at Giruvegan, and am open to going after whatever loot, to get whatever better weapons. What's the most reasonable weapons to go after through loot gathering at this point in the game? (by reasonable, I mean not foolishliy hard and time consuming)

Any tips?