I messaged this guy but they're Low seats so no good to me,some of the Irish crew should look at them,would they suit you Laurence?
https://www.donedeal.ie/motorbikeextras-for-sale/bmw-r1200-gs-sergeant-seats-/21715937
https://www.donedeal.ie/motorbikeextras-for-sale/bmw-r1200-gs-sergeant-seats-/21715937