How much play is in the clutch? If there is more play than before it could be as Dave said and the nut securing it to the pivot arm has loosened or the cable has stretched. The cure is to tighten it up so there is just a slight amount of play so the clutch is fully disengaged while driving. Or, again, as Dave suggested the shifter plate has moved and it's now out of alignment. This is most notable when shifting into reverse. A quick search will tell you how to adjust the plate. Unfortunately I can't remember. If the grinding happens through all of the gears the throw-out bearing could be going bad but that's the least probable reason, especially if you have few miles on it.
I'm not familiar with air-cooled shops in your area but Anthony is in Auburn, CA about 100 miles northwest of you and is an awesome mechanic if you need help with it.