The angel statue is only located in Wacky Workbench Zone 1's past. First, travel to the past from the present. In order to enter the room that the statue is located in, travel to the right side of the statue and jump over the ramp area. You will travel through the tunnel and enter the room with the statue.
Take a look at the map for Wacky Workbench Zone 1's past here. If you look about 1/4s of the way to the right from the start of the picture and then look down toward the bottom, you should see what looks like a small room with a green woman who is bending over and reaching her arm out. Just to the right of that room is a ramp with four coins above it and a speed shoe box to the right of it. If you jump directly over the striped part of the ramp, you should enter the tunnel leading to the room with the statue in it.