M_Boats: Monty15

Question for Bob or Jerry Montgomery I was wanting to know where I could buy one of your boat motor mounts. I have just bought and 1981 Monty15 with one of the fiberglass motor mounts on it. And I bought a 3.5 Mercury new motor and I can turn the motor around to back up it's to close. I was wondering where I could get one of the adjustable motor mounts you put on your new boats? And is there any thing I should know about mounting the new motor mount?