Since such a clamp handle can become brittle and break after years, it is very cheap that you can get it individually. Above all because rope clamps are often installed in such a way that you cannot access the lock nuts without "disassembling half the ship". The exchange is simply relieve the clamp, pry off the snap ring, push out the axle carefully, take out the broken lever residue (it is easier if you loosen the screw that holds the terminal housing together a little), insert a new lever and push the axle back in, reinsert the snap ring. Tools required 2mm screwdriver, tweezers, small flat-nose pliers. Since the snap ring can easily go overboard, you should have spare parts in stock, especially if you do the work in the water. You have to take care of the axle, because there is no solo.
Easylock has been a reliable product for years. Over time, fatigue can occur. The replacement lever ensures that no new complete clamp has to be bought. The price for a simple plastic injection molded part is, in my opinion, slightly overpriced at around 10 euros. But at what point is sailing cheap?