I want to point out that I am just sharing them because I do not see them here, and we need to remember we are a gaming site as well as the botting and such site.
Yet again I am not the creator of these skins or programs.
Skins: Uploading (481mb)
If you don't want to wait for my download you can download them all individually from here:
http://www.youtube.com/user/MofoTheHobo/videos
LoLItemChanger: http://www.legeex.com/LoL/LoLItemChanger_3.1.0.6.zip
LoL Item Changer (Tool) - League of Legends Community
Note: Skinning is 100% legal in this game because it does not affect game play.