Peel and Seal or Quick Roof from Lowes or HDepot. Easy to get and easy to install. Just make sure you have a good razor knife and plenty of extra blades. And something to push it down into creases/etc. I just used a small roller, the backend of a few different screwdrivers, and the razor knife.
Some people say it will smell... but from experience: I have a 69vert in South Fla with the top down in summer and havent smelled a thing in 5+years!