Quick Disconnect Steering Wheel ?

My son is looking for a quick disconnect steering wheel for his '68 Dart. His though is..."can't steal it if you can't drive it.." I'd have to agree with that logic. Grant makes a QD hub that works with their wheels (which we have), but we can't seem to find one in stock anywhere. Is there a reason nobody has these hubs..? And does anyone else make a quick release hub that fits our columns..?

Here's a link to the Grant 2001 Quick-Release hub:

http://www.summitracing.com/parts/GRT-2001/

Thoughts, anyone...???