copper slug

where can i find copper slug to put in my power cond?
Ebay, look under oxygen free copper rods. You will find assorted widths, buy a rod and cut as many as you need for pennies a slug.
Post removed 
Could be wrong, but I think copper grounding rods are not solid copper, but rather copper plated steel rods.
Mr C- You are right and wrong. The cost of copper is pretty high, compared to most other metals(scrap is fluctuating between $2 & $3 a pound, lately). Thus, grounding/earth rods are available in solid and plated versions: (
My apologies, in advance, for my cluelessness. Would you please tell me what are you planning to do with a copper "slug" and your power cord? Thanks, Happy Listening