trying to trace 850 commando mk111 SGH 590R

[sticks]

Hello probably a longshot but i am trying to trace my old norton commando mk111 Reg SGH 590R,bought new in 1976,according to dvla website it is still registered with them,last taxed in 1984,was white,now red,would love to buy her back again,or do a swap for my restored 68 triumph 500t daytona.might still be in a shed somewhere,if anyone knows of here wereabouts please contact me.  west sussex
Dave.