1955 AJS M16 front forks

[Morbec1]

Hi Help needed I have at last decided to restore my AJS big problem front forks locked solid I have managed to free one leg but the other leg will not free I have tried WD40, heat and gentile force to no avail any suggestions, (I need to change the stanchions), also where can I purchase a thin wall socket/box spanner to remove the remove bolt that fits in the bottom of the fork leg.

Phil