I have a 3913 Ladysmith with the factory Novak sights. I'd like to replace the front sight with an identical Novak tritium front sight. I don't want a full set, just the front, and I want it to work with the existing rear sight.

http://www.novaksights.com/novak_sights.htm

Problem is, ordering from the Novak website requires you to know the exact total height of your existing front sight. Does anyone know which Novak front sight post S&W used for the 3913 Ladysmith?

I could just send them the slide and have them install it, I suppose. But I figured I'd ask here first.