Can anyone suggest search terms or products for a rack to tie stuff down that rides over or replaces the passenger seat on my R1200RT? I'm sure there are "related threads" and discussions here but I don't even know what terms to search...seat rack? rack on passenger seat (pics of hot pillions naked?)I am often frustrated by the lack of tiedown places on that bike for my rubber duffel and Kreiga pack. I've managed but it always seems jury-rigged half assed looking.