I found a gently used (actually, no scratches or anything) OEM case on this forum. It included the mounting plate and backrest. I paid $475, including shipping and insurance. I guess it depends on how quicly you want to get one. I had taken the OEM part numbers and put them into Google. Someteimes dealers are pretty cheap. RonAyers.com comes to mind. Way cheaper than on the Yamaha website.
Keep in ming that you'll either want to replace the entire rear support with a metal one, or understand that you should only put about 11 pounds (rated for OEM case) back there. I'm just using mine for shoes, rain gear and bike cover. Maybe a light jacket too. The side cases will take the bulk of what I'm packing for an upcoming road trip.
Those "cheap-o" cases seem nice. I just saw one on the back of a used BMW 650 at a local dealer. Looked good. I didn't inspect it up close but it was locked. I was curious to see how weatherproof it would be.
Keep in ming that you'll either want to replace the entire rear support with a metal one, or understand that you should only put about 11 pounds (rated for OEM case) back there. I'm just using mine for shoes, rain gear and bike cover. Maybe a light jacket too. The side cases will take the bulk of what I'm packing for an upcoming road trip.
Those "cheap-o" cases seem nice. I just saw one on the back of a used BMW 650 at a local dealer. Looked good. I didn't inspect it up close but it was locked. I was curious to see how weatherproof it would be.