Have you gone through everything in the leaks write up in the FAQ's
Mine was leaking from two places, the body seam below the windshield where the cowl and the tub meet and at the body seam where the cowl meets the tub on the sides at the top of the fender line essentially. I used a dental pick to dig is all out and then got a tube of body sealant from the local paint supply. Maybe not as easy of a solution for you though (if that's where it's leaking) because I was doing a full color change at the time so didn't have to worry about matching anything up.
You can see here the two areas I'm talking about. After sealing they were coated in Chassis Saver, so that's the silver color......