We've got bosses that physically fit the 14a, but they won't automatically cancel the indicators without a little bit of modification, the horn would need wiring to a seperate switch and it won't do the airbag light.
If that's of any interest then it's just the steering wheel boss listed on the website.
We used to do the proper airbag cancelling jobbies, but they didn't seem to work for all cars so we decided we couldn't sell them.