If you are just buying the cutting line for this machine then I am reliable informed that it is available through most DIY stores and from sites such as E-Bay.
If just cutting grass it is recommended that you go for the 2mm Green Line which is SL003. But if cutting tougher stuff go for the 2.4mm Line which is SL004.
I would in all instances if you are not sure to contact ALM Manufacturing who were extremely helpful with my query and know all there is to know about these products - Thank You ALM.
Jayce Hunter, June 2009