This gets a bit complicated. According to the Honda parts catalog those were one year forks. As I recall from back in the day they were still trying to figure out what the best diameter was.
But... One of my riding buddies has a set of 04 forks on his 93 CR250. The key is you need all of the parts, forks, wheel, brakes and triple clamps.
As long as the steering stem is the same length and you can find bearings with the right combination of OD to fit the frame and ID to fit the steering stem you can mount them.
If you just want to bolt them on and go, look for a set of used ones for an 89. Bike Boneyard in Montana says they have them for $150 (they aren't so good at keeping up their site though, so contact them to confirm.)
Good luck.