I'm an Italian FJR rider and member of the local club (stefano sarao). I saw your contributions in our Forum and I would like to ask you if there is an adapter for the iQue3600 Touratech holder that will fit on the FJR1300.
According to the Touratech people in Italy there isn't one

Thanks very much for your help and apologies for "invading" your Forum!
Wishing you and our Belgian colleagues safe riding
Stefano
teerex51@yahoo.com