Comment 13 for bug 693173

For good icons (if I may kindly suggest), you could contact https://plus.google.com/100530892038948253747/posts , just ask a question

the person from the link has made monochrome icons for various lenses and apps

I am not 100% sure that he will help, but you should ask,

I don't think he wants money, he is usually "rooted" in dealing and tweaking Ubuntu apps