Convertible Top company

Does anyone make a convertible top with the correct curvature to the glass rear window for the 67-69 A body convertibles? On a 67-69 Barracuda, the rear glass should be very noticeably convex for the top to look right in the "up" position. On the Dart it should either be flat or slightly concave. A buddy recently had a new top installed on his 69 Dart. On his, the rear glass is slightly convex, so it creates a large gap between the rear glass and the sides of the top when the top is in the "up" position.