FRP construction readily lends its self to being repaired. There are different types of fiberglass roof structures. Depending on what you have, will depend on the type of repair that will be involved.

One type is a single skin. This is where there is one completed layer of fiberglass. It will be slightly flexible, probably opaque, and maybe ~1/4" thick. It may or may not, have a supporting structure moulded to it. It can lay over roof bows.

Another construction is a cored laminate. This is where two layers of fiberglass sandwich a core of honeycomb, plywood, Styrofoam or many other products. This results in a very rigid construction, and usually doesn't need any additional supporting structures.

Your repairs will be determined by what type of construction you have, and where the damage is located. Whether you can effect the repairs yourself, would be determined by your personal skills, along with some experience and knowledge of FRP construction. It only involves some basic tools, and is much easier than sheet metal fabrication. A working knowledge of epoxies and glass materials would be helpful, but not absolutely necessary.

Here's a good video on a simple repair:

http://www.youtube.com/watch?v=6N7YMr6E564

Most body shops and marinas could easily effect such a small repair, especially if it is a single skin layup.

Gard