Are you in Argentina right now? There are many levels of qualities and parts to replace, depending on your Budget and how badly (if any) damaged is the sliding Surface of the plate gear Assy (part #16:
https://store.cscmotorcycles.com/PLA...-p/z19-115.htm). In Buenos Aires en nearby cities there are also a few mechanics who know this bike well. If you use Facebook you can join our group (
https://www.facebook.com/groups/touring250/) and take a look around or ask there.