I changed my MY97 big Gay bus wheel for a Momo wheel. Connected the airbag myself no problem. Grade A subaru breakers sold me mine for £250 with the airbag plug. Only drama was the old one is three wired and the new one two ( Grade A can advise ). Don't be put off by people who say its dangerous because I nearly was. My local dealer thought I was a nutter. ( probably right )
Took about 20 mins to change was a bit wary of connecting the bag back up but I had no problems at all.
Cheers Jay
PS I accept no responsibility if you decide to take my advice and it blows up in your face LOL.