Steering wheel airbag

You should just be able to undo the 4 bolts.

Personally, i'd just use a non-airbag wheel be it an OE wheel or an aftermarket replacement. Yes, you could separate the pyrotechnics and the bag from the 'unit' but it could be risky, one false move. Not saying you could easily trigger it, I work with airbag systems on a regular basis but I follow the safety regime pretty well and I am only usually removing and re-installing, not 'tampering', as the manufacturers would call it.

Thanks for your thoughts Rich, have you ever seen or heard of one going off with no wires attached to it?

Put up a picture or tell us what the wheel is from and you may get a definitive on whether it can be done safely.

Usual practice is deploy safely and dispose. Normally clamped in a vice well away from yourself and detonate, we had an explosives cabinet when I worked at a large main dealer and we could store them safely and have a set-off once a month of the units we replaced. Theory I guess was it saved dragging the det-kit out every time or something but a coil of long wire and a battery do the same job.

I'd go with this option ^^^^^
if you don't plug the air bag in it won't go off 
so it's as safe as it would be in the car it was removed from. 

 They've been fitting air bags to cars for over 20 years now and generally the older they get the less chance they have of working at all 
it needs a power supply to set it off so I recon your better of using it as it is instead of attempting to take in apart and maybe loosing some fingers