I'd be really interested to find something similar to what you're after but possibly without the wood, I don't know. I've got a Mk1 though and from what I've found, they seem harder to get alternatives for.
Im sure with the right amount of trial and error you could fit an airbag module inside the boss of a mountney-esque wheel, but im not sure anything like it actually exists otherwise all us classic lot would be fitting them!
Hi
This is the best I could find.
It looks a little modern.
Maybee drilling some holes
in the spokes and put some
new leather around it and
get the look you want.