Hey slasher
you can buy any year rs forks but only 92+ are upside down forks, you will need to have the stem re-pressed because the diameter of the rs stem is massive and to short which is not to expensive. Once you get the rs forks you will need a front wheel ,rotars,brakes,clip-ons ect. http://www.gpstar.net/home.html might have a pair of forks which is in the usa happy hunting
Regards k