Originally Posted by Too Many Toys
Its a Famsa #244 with the 800GS specific mount. Got it from Biker World USA
. They don't show the 800GS base online but you can request it in the comments section of their online order form.
I like it a lot. The bag zips off the base so its easy to remove. And since the 800 has the fuel under the seat there is no need to remove the base. I electrified it also.
The Famsa 260/9 is dedicated to F800GS and includes tank panniers as well.
I use it and am very pleased how well made and sturdy it is.