I have a brand new never used Giant Loop Fort Rock Top Case - this product was discontinued
This sold for $399.99 US new plus tax and shipping
For sale for $200.00 Price reduced CDN (plus Shipping or pickup free in lower mainland)
Description (from the GL Webpage )
Riding 2-up or carrying lots of gear? This bag provides a back rest and arm rest for your partner, there is even a water bottle holder and a half partition on the one side.
The Fort Rock Top Case surrounds your passenger with security and comfort, providing cavernous carrying capacity for sleeping bags, clothes and other lightweight, bulky kit. Straps to Siskiyou Panniers and tail rack. Compatible with virtually any hard luggage, too.
Named for Oregon’s desert landmark, Fort Rock.
Volume: 84 liters
Super tough trucker's tarp with YKK water resistant zippers (splash proof)
Includes heavy duty two-sided hook-and-loop mounting straps
Multiple attachment points fits a wide variety of bikes/luggage
2 haul handles
2 exterior pockets
Separate jockey box compartment
Reflective trim improves visibility from all angles
Military-spec materials and construction
Made in U.S.A.
REQUIRED EQUIPMENT: Motorcycle must be equipped with Panniers or other luggage and tail rack.
I have attached some photos from the web that show the case mounted on various bikes
Mine is brand new never used