I made a few variations of one you might like out of boredom. Maybe You'll like one. Let me know what you think.
I made them 250x250 so you can use them for other things such as skype as well without them losing resolution. They'll resize when you upload to a site for your avatar, though. But I'm sure you already know that.
(If you want them to be resized to 150x150 or even 100x100/50x50 just let me know I have the PSD saved. Just PM me)