for those of you with the ae86 where did you guys get the adapter plate for the intake so you can add a free air cone? i need to find one for my car so i can install my K&N air filter

You could get a custom one knocked up from an exhaust shop fairly cheaply. Will allow you to route up a CAI as well and possibly avoid any heatsoak areas.

as for the adapter plate, me and my friend ... mostly my friend ... are working on our 86 and he mentioned something about having to heading to a store up in frisco for it, which is only like 25 miles away but its at the main toyota dealership or something like that.