You could probably go to a locksmith and get them to order it in for you.
Dad's a locksmith and I remember he had a lock like that for his old Gemini.
If you want to deter amatuer theifs, id go for a good quality steering lock. 95% of the steering locks you see people using are easy to snap off. The one I got was thoroughly recommended by an experienced locksmith... I forget the brand name though.
It was around the $300 mark.