I wouldnt put the hammertime ones in, they will come apart. The first ones were done with a steel rivet that was just not thick enough and the later ones had a small allen head bolt for the pivot, but both eventually fail and it takes out the whole clutch and is dangerous. I would stay away from those. I have used the heel clicker weights since he brought them out, all the generations and the least amount of problems is the 40-10, they work great.
If I were you just order a new set of 40-10, they are like $235 comes with 2 springs and all the hardware, the newest ones are billet steel.