http://www.ftdfloristsonline.com/waltdisneyworldflorist/pages/magicalwelcomes/display
This shows the Mickey's Grand Welcome, and if you scroll down it also gives the price of the Mickey's Welcome, and what's in it.
They told me yesterday on the phone that they have some different plush you can add (but didn't have any Disney cats, darn it!) They also told me that I could order anything "extra" to be added from the disney.go.com/shopping (or something like that) and have it sent straight to them to add. (the disney shopping DOES have a couple of Disney cats, yay, hope they do when I travel.) Also, they told me if I had anything I wanted included I could send it to them.