I just looked at a book I have on the KIA by John Emms: Starting Out: King's Indian Attack. Basically, most 1. e4 KIA positions against the Sicilian can be reached from the flank move order. He recommends playing e4 on the fifth move, after you've fianchettoed and castled. Of course, you should do some more in depth research; I only played the KIA very briefly, so hopefully someone more knowledgeable than myself can give us some more info. There is also Openings for White According to Kramnik: 1.Nf3 which probably provides some interesting lines (I have them, just haven't cracked them open yet).
KIA Repertoire

Just looked at volume three of the Kramnik 1.Nf3 book. He recommends 2.c4, setting up a Maroczy system. So that I guess if you are committed to the KIA you'll probably not want to go that route.

dear daverook, i'm also from jersey down near wildwood, i'm a low officially unrated player who is trying to improve my
game, i'm a retired chief of police from stone harbor, 61 yrs old, i'm paralyzed on left side by 2 strokes, but am getting hooked on chess.
my email is antne003@verizon.net
write some time. hope all is great
tony (antne003)from jersey shore.
Hello,
I'm a low-rated, 1200 or so, former 1.d4 player who'd like to change my repertoire by playing 1.Nf3 on the first move always, with a view towards setting up the KIA. If Black replies 1...c5, how do I get the KIA setup and still avoid the Sicilian? I'm totally new to 1.Nf3, but I like the idea of playing the KIA since there will be relatively less theory to learn.