here is mine from 3-4 years ago:
I found one in the states for $50 off Fleabay including postage and thought that will be worth it if it works.
9 months later and I had time to fit today in 90 minutes and it has the right effect.
I started by drilling a 1.5mm hole through the back of the creature and tied in fishing line through the hole and locked around both armpits to help stabilise him once he is tied in place.
I then disconnected both the motors as they don't work anyway and then I snipped the wires from the lamp in the back of the cabinet and removed the lamp holder to clean and relocate.
I then purchased $2 of wire from Jaycar and connected the wire to the snipped light source wires. I then routed these 2 cables from the original light source up to the hologram location.
photos below are of the fishing line and the lamp holder to be relocated.
I then drilled 4 strategic 1.5mm holes in the cardboard type shield that surrounds the lagoon see through panel and then tied the Creature into place with fishing line to what I thought would look ok. I then fastened the lamp from the back of the cabinet to the hologram holder in the centre and directed the lamp towards his crest area. I soldered in the wires from the original light supply via the Jaycar wires.
I purchased a green #89 LED flasher lamp for $6 and installed it into place.
below photos show the creature and lamp fastened into place, and a screen shot of the globe that I used.
I then put the playfield down and turned on and went into the test mode to check everything. It worked which was good, but just needed a small adjustment of the creature and of the lamp.
I then started a game and hit the required targets to get to the FILM mode quickly and once I placed a ball in the subway during the multiball period the light came on and it didn't look bad - better than a blank lagoon and it's always green and will not go blue and it's a 3D object so I am happy.
If I had to buy a hologram, mirror and 2 motors and some freight for all I would be up for $600 there abouts compared to the $58 I spent.
Hope that helps........