You need to find a decent local hardware shop and get some of there generic stuff, new nitromoors has been poo for years, best bet is soda blasting though at a local blast co.
Matthew
Does anyone know how to differentiate the new Nitromors vs. the old one? My local DIY shop says he has old stock out back (whihc I am planning on buying a job lot of) but want to make sure I buy the right one!