The way the trunk lid curves you'd have to go OEM at this point, unless you get creative.
it has two prongs as well as adhesive. I just got one in the mail that I will be painting and putting on at sone point.OE is probably the only way like trentimus said.
If you get the emblem off, or if you already know, see if the A emblem has two prongs that hold it to the trunk or if its just adhesive... Please and thanks!