Hm, I'd guess many are fairly generic to the steerer size, eg 9/8". Some might not play well with other brands, but I'm tipping that'd be rare.

You should be able to score one for $0 at your LBS.

Come to think of it, '88? If it's a road bike, that could be a 1" one... threadless 1" setups are a bit on the rare side.