This was discussed in a post yesterday but I started a new post to change the heading a little.
I contacted TRUGLO late last night and got an answer this morning. They are now supplying S&W with Tritium Pro Night Sights for factory pistols. Also, they are intending to put the EZ9 sights on the public market soon but could not provide a firm date.
I would guess those shipped to S&W will come out on Performance Center guns like the 380EZ did. I am glad that I haven't bought one yet.