DLS makes a great drop in 3-way for your car. UP36. 1" tweeter, 2.5" mid and a 5.25" mid/midbass. DLS is well known for making great gear, and is on the of the top brands (if not the top) in Europe. Apparently a direct drop in.
Current : 2013 Mini Countryman JCW
Past: '88 E30 M3, '69 BMW 2002 Ti, 2000 328i, Audi A6 TT, BMW X5 3.0i , Audi A4 1.8T