Kevin,
Here's the link to the top.
www.autoberry.com
Choose the German material.
I also considered doing it myself, but decided I didn't want to take a chance and ruin the top. I got a couple quotes for $450, but ended up haggling a shop I've used before.
Retroman,
I too considered just replacing the window, my original top was in good condition, but I was told that it may leak from the original stitch holes.
Rdass,
In my opinion the top quality looks and feels OEM.