Filter request for better integration

I’m working to make work my plugin
http://ww.wp.xz.cn/extend/plugins/avatar-tooltip/
with yours.
I have to use your plugin filter simple_local_avatar to add a [rel] attribute to avatar image tag.
I’d like to have a 2nd parameter in that filter hook: the $id_or_email.
The new hook line should be (simple-local-avatar-php, line 91)

return apply_filters( 'simple_local_avatar', $avatar, $id_or_email );

Do you agree about it? Can you make it? Thank you.

http://ww.wp.xz.cn/extend/plugins/simple-local-avatars/