who makes the best fenders and has purple covers

I have never found purple covers off the shelf. The Polyform fenders from www.overtons.com have a 'cobalt blue' that is pretty much purple; and I use black Polyform fitted covers from the same site over them.

I did just notice on the http://www.polyformus.com/ website that they do make true purple fenders.

I prefer Taylor Made fenders. Lifetime warranty. They replaced one for me last year that developed a pinhole, no questions asked. Just took it to a West Marine and they exchanged it.