ThuleMan,
Being the cheap SOB that I am, I made my own. I had been looking at about three different styles/designs, studying them, figuring out which would be the easiest to make, and this is the one I decied to copy;
http://www.dauntlessmotors.com/hitch-pages/yamaha.htm
Click on the link and scroll down to near the bottom of the page for pics, description and pricing. I modified mine slightly from this exact design, but it's essentially the same. Since I was in kind of a hurry to get mine completed, I didn't take any pics of it, but if you'd like I can take some and post them.
And to be honest, I can't take all the credit for making my hitch... I had quite a bit of help from a few co-workers with welding, fabricating and in general, just being there to lend a hand.
If making your own hitch isn't an option, and the $295 price tag is too steep (I know it is for me!!), here's an email address (and his reply to me) to another source.
gcourtem@shaw.ca
Hi Aaron, Yes I do manufacture trailer hitch for the RoadStar, the retail is $199.95 plus shipping (I would need your address in order to quote you on the shipping).
I included a copy of the cd-rom instructions so you could see the hitch and know how in mount on the bike.
Thanks, Gilbert
GC Manufacturing
Hope this helps and ride safe!!
In The Wind,
Aaron