If you haven't found it yet, Rumkin.com works pretty well most of the time.

Who is your service provider? That will determine how you get the stuff onto your phone, unless you plan to use software and a data cable. As far as where to get the stuff, browse our forums and you'll find lots of sites! Particularly in the Cellphone Stuff section of our site

please somebody help me to download and improve my cell style(ringtonespolyphonics-logos-java games)
i have no idea where can i get them?
thanx