If it's slipping on the flat how do you think it will fare uphill? People might get over illnesses by themselves but nothing mechanical ever fixes itself. Unfortunately you've let it go from bad to worse so it's likely to cost more than it would have.
Also I know from experience nothing is cheap on a $WD. I have to wonder why the clutch failed anyway. My old 47 series troopie never needed one in 30 years, including 5 years carrying 1.5 tonnes over some of the country's worst roads. It's either technique or a dramatic drop in build quality.