Give Daryl at Acme a call at 1-760-949-6794 and he can help you with the price. I would expect that you will some hard part (bushing and such) that will need to be replaced given the age of your machine. Also, you will need to purchase a hard sided rifle case to hold your KX legs steady during transport. Hit WalMart for the cheapest price.
As many folks on this site are already aware, Daryl has done my work for years, and as you read in the first post on this thread, there is no equal on the KX suspension. That's why the fast guys use him...
Rick