There's not a lot of third party stuff out there for Guzzis. Remember, they have a smaller market share than Triumph. There are some cool pipes, luggage, windscreens and performance parts for them. I didn't buy the bike with customizing in mind. It's a different kind of ride. I bought it for what it is. A relativly light weight, torquey, shaft drive, good handling Italian touring bike. The thing will out run my TBA and most Harleys are left in your dust. I'll probably have the seat cut down. It is a little tall in the saddle, but other than that I like it as is. My TBA is pretty much a stock bike, with the exception of performance items and changes to make it more touring friendly. I liked the way she looked when I bought her as well.
