Instead of making the chocolate leaves can I buy them somewhere?

Answer 1

Hmmmm, this may not be *exactly* what you're looking for, but here's a try:
http://www.vermontcountrystore.com/jump.jsp?itemID=32982&itemType=PRODUCT&searchid=inceptor
http://www.lakechamplainchocolates.com/products.aspx?pn_deptid=285
However, I assume you are probably wanting the more delicate, realisitic looking leaves. They are probably too fragile to make and ship, and are easy to make:
http://www.bhg.com/bhg/story.jhtml?storyid=/templatedata/bhg/story/data/cookingschool_chocolateleaves_10032002.xml&catref=cat740057
http://www.nestleeuropeanchocolate.com/nec/entertaining/decorate_chocolate/chocolate_leaves.asp
http://www.wilton.com/forums/messageview.cfm?catid=8&threadid=75016
And here, scroll to the very bottom (this has such pointers as "Be sure to avoid poison oak, ivy, oleander and sumac.")
http://www.baking911.com/chocolate/mold.htm

Answer 2

It'll be a bit pricey, but if you have a local confectioners or gourmet candy shop, they will be able to make them for you.