http://tesnexus.com/downloads/file.php?id=30791 can change the weapon-based combat to be more like Oblivion and I'm pretty sure there's at least 1 mod to make blocking a manual action. Just remember, you can make Morrowind more like Oblivion, but don't expect it to become some kind of Oblivion:Origins. There are 2 very different games on 2 very different engines after all.
Anyway, good luck on your search.