I believe the 1992 used the compression type plugs. OEM catalog number is 292000002, but you can pick one an equivalent just about anywhere that sells marine parts. Some Walmart’s even carry them... They should be $10-$15 at most.
There's a few different styles. One with a flip lever and one you twist. I think Wal-Mart carries the one with the long lever with the round ring end, probably really tight to fit that if it even will. I always used the short flip or threaded T style on my old skis.