I have had several horror scripts as well. Throughout college I was a screenwriter emphasis and was the "horror guy" for everyone since I was the only one that understood how those movies work lol
So posting more of those places to put my scripts would be awesome! I'll keep searching through the forums to find more! Like said, if the OP had a bit more credentials or something then I'd gladly toss my ideas.
Also we (BrainDamage) distribute horror movies and are big horror film supporters, so if you did find a script and looking for some distribution when its done, be sure to message me or something.