I just found some amazingly good news for you.
The Switch mechanism for the ignition just clips off and can be replaced - probably by the switch from ANY Fiesta WP/WQ.
There's a press tab on the top and bottom of the switch itself. The bottom is easy enough to see. The top is harder to see and you need a prod to poke down between the column and the switch holder.
Top
Bottom
Column with the switch removed
The switch with the pins you want to test - especially between 1 and 4 - although it is harder now to tell what the key position is with it removed
The back of the switch that inserts over the barrel pin:
Now I may have jumped ahead of myself. Your testing may show the ignition switch is OK. But I thought this info too cool not to share.
Lukeyson