No VX's were ever manufactured with a factory sunroof/moonroof (there was no Sunroof Option available). Any VX's found having a sunroof/moonroof are 100% aftermarket, and were installed by a P.O. at some point in the VX's life.

My VX does have an electric sunroof/moonroof that was professionally installed by a specialty shop per the order of the P.O. Fortunately, mine doesn't leak a drop in our heavy and frequent Washington State down-pours. In fact, your experience is the first I've heard of an electric version leaking in a VX. Normally, the cheapo "pop-top" sunroofs are quite common to leak (you get what you pay for).

Yes, you are correct that there is no gutter or run-off designed into the aftermarket sunroof/moonroof and it will pee on you if you open the roof shortly after a rain or car-washing episode (just expect it). I've found a quick drive down the freeway at 70 MPH removes 99% of any outside water residue left by rain/car-wash before attempting to open the roof.

Follow your own best advice, and take your VX to a professional sunroof specialty shop. If they can't fix it; it can't be fixed.