I have a Gearsack tank bag, magnetic mount, for bike with a tin tank.
Its a bit dusty, hasn't been used for 3 years
Separates into two units, one can be worn as a back pack.
No further use to me with an ST 1100.
Asking price?... just pay for the postage, is all.
Some members have other bikes in their shed. If this is of any use to anyone, drop me an email.