Head over to bikebandit, punch in your model and look at the parts. However, the parts houses and the dealer should know what parts fit what years. If they are telling you that the 92 part is discontinued then it might be different than a 93 part, because parts that fit several model years usually use the same part number.
But, check bikebandit first, they should be fairly reliable in cross matching parts. If you have no luck, go to ebay and just keep watching there because a lot of 300's move through salvage houses and you should be able to find one if you keep your eyes open.