Some women buy boobs and then rent it and themselves out by the hour. The good thing about this is unlike bouncy castles there is no need to inflate it or deflate the boobs as they are constantly perked up. Not sure if you want to go this route.
Another thing to consider is that you dont need a brick and mortar store for this as the silicone boobs attracts a lot of attention and it would be easy to get people to rent by the hour if you set it up on a street corner.
Fck your employer. Definitely get a lawyer.