I have a gently used T-Bag Helmet Bag for sale. This bag has a mount that goes over your back rest, and also other tie downs. I have the rain fly, original box that is was shipped to me in. I can get pics latter today if there is any interest. I hope this link works. $100 plus shipping, obo. Tim
http://www.tbags.com/detail.aspx?ID=20&SelectedCat=2
http://www.tbags.com/detail.aspx?ID=20&SelectedCat=2