I used this from RS. **LINK**. Make sure you get the right size for your machine, that one is for the big bore version. You may be able to get it cheaper elsewhere but at the time only RS had it. Before that I bought a cheaper version from RDG that was too stretchy and though sold as for Myford was too wide for the newer machine. You'll find they need to be installed rather tight. Make sure it's the right way round, there are arrows printed on the links to indicate the drive direction. Having bedded in I find it excellent.