SW Motech Bags-Connection "Engage" bag.
There are different sizes, but been using this one for years--it's a transplant from my 1150.
I like the SW-Motech Bags Connections set up because the bag does not rub on the tank.
I think Twisted Throttle sells them, among others.
I thought I would be bothered by the aesthetics of the mount, but
the bag is almost always on so I don't see it
and
when the bag is off, it doesn't bother me.
John