Try Google.

You can draw your own--have made several of them. Birds and a landscape.

Funny thing happened 5 years ago when I was in the woodworking forum and someone mentioned intarsia. I had never heard of it. Now it's one of my favorite hobbies.
You can always use stained glass patterns or coloring books. Here is a list of several places to purchase patterns or download free ones.
http://www.intarsia.net Bruce Worthington
http://www.intarsia.com Judy Gayle Roberts who has really made intarsia popular again
http://www.intarsiadesigns.com Great for downloading
http://groups.msn.com/intarsia/_whatsnew.msnw I am a member of this forum. There are at least 6 free patterns available, you have to join (free) to be a member.
I don't sell intarsia anymore but do like to share what I've done. I have a free magnolia pattern that I made a while ago if you'd like to give it a try.

Good luck, it's addicting.

Here is a link that might be useful: my hobby of intarsia