You can use pretty much any small container for a coolant catch, or better yet use none. Switch to distilled water and water wetter, if a little spews out it won't cause problems. I use a baby bottle on the SV (race org.'s require something) and it has collected maybe a half ounce over 3 race weekends
How do you check the radiator level to make sure you still have enough fluid?
If you think you may lose sleep over the water level, LP has some fancy aluminum catch cans for like $40. Your local car speed shop prolly has some too, along with stuff to dress up/cover up all those hoses and lines.
A very nice looking bike, but it needs abit of something in the front. I would think that a belly pan, or a colored cage, or perhaps just some radiator covers will make it all come together.