Joann's Craft store was having a really super sale on faux fruits and veggies for about 25 cents a piece. You might check there for the green apples. If there not green, paint them - you can find that exact color paint as it's made by "Folk Art" paints, also find that at Joann's.

Would love to see a pic of your wreath when it's done, please post.

google image search may help with ideas

apple arrangement images
http://images.google.com/images?svnum=10&hl=en&gbv=2&q=apple+arrangement&btnG=Search+Images

Here is a link that might be useful: apple wreath images

Here is a lamp idea. The apples aren't green but you could
always paint them that way.

Here is a link that might be useful: Lamp Idea

That's a great wreath site and I love that lamp, green apples would look great on it and very small green apples in the base.