Hello everyone! The new guy needs some help! I have an '87 Ranger 360V & my tongue coupler finally gave it up. Inside to inside on the trailer coupler area is 2 15/16". Will a standard tongue coupler fit this or will I have to buy something from a boat dealer? I measured a 3" channel & it measures 3 1/16" inside to inside. It won't fit inside or outside, so.... Any advice & assistance is appreciated! Thank you!