I have seen an add for the SW99 in 45 acp too. I think it would be a great seller but I wonder if it would be single or double stack mag. The 9mm and 40 s$w are to small for 45 so an entire new frame and slide would have to be made. They could go single or double.
I am going to call Smith this week and ask when it will be released. Fortunately I live close to their plant and range where you can buy some ammo and shoot any one of their models! Will post info when I get it.