Just checked iboats store and they are out of stock so I would Google it and start surfing.
They are well worth the money, I have run miine for 6-7 years now without a single problem.
Because it will set your outboard back about 4" you want your AV plate about an inch higher than it was, Mikey. That should put the AV plate 1" to 2" higher than the keel.