I have a sportline steering wheel (390mm) for sale, from a 1994 W124, complete with airbag. Intended to put it on my 1994 E420 which was totaled last year and I don't have any further need to hold onto it. As you can see the leather could use refinishing, though it will work fine as is. As far as I recall, all the internals are complete for a direct swap, though I am sure the steering wheel gurus on this board could give you further information.
I have the matching airbag, which came with the steering wheel when I purchased it.
Asking price $450 + shipping (ground). Not sure I could ship overseas due to the airbag.
Please let me know if you have further questions, thanks!