try sierrafery or discool they a good with wires,
there are a few earth points, try a search
http://www.landyzone.co.uk/lz/f8/information-please-203168.html
this should help you
there are a few earth points, try a search
http://www.landyzone.co.uk/lz/f8/information-please-203168.html
this should help you