I got this tip from Teagan who got it from Sasy. Mesmerize Dungeon has some wild and naughty outfits for free. These outfits are very unique because of the hooding, the latex is an actual skin. The Mesmerize Doll comes with 4 different skin layers and horns. Each layer has varying degrees of intimate parts showing so be warned now that only the (closed) one is work safe. The catsuit is on the bottom clothing layers. They are located on the first floor between the staircase, one in a gift box on the floor and the other on the brick archway.
WARNING: The Mesmerize Doll will remove your skin so note the name of it for when you want to change back.
Fabulously Free in SL: Fantasy Eyes – Brown Rainbow($0L)
Mesmerize Dungeon: Mesmerize Doll($0L)
SYD: Style Your Destiny: Eve Shape($1L)
Total Cost: $1L