You can find RPMs for just about anything (including apache for RH9) at: http://rpmfind.net
I take that back, I can't find an RPM for apache/rh9 on that site, sorry. I checked http://freshrpms.net
as well, but it wasn't there either.
FWIW, I just installed apache2 on my RH9 box last night from the source, and it was really simple. You might consider doing this.