How can I change the Icon of a Shortcut on my Home Screen?

I have a couple direct dial to landline shortcuts that I use at work regularly. There are no avatars associated with those contacts and the Homescreen icon just shows a generic Android Avatar so they are indistinguishable. I have a couple other contacts whose avatars are still indistinguishable because they are so small. I'd like to be able to set a shortcut icon instead of having to mess with making custom avatars. Any apps to do this?