I had trouble sourcing copper mesh to replace the stainless packing in my father's T500 still
You can buy it by the pound in the US but the postage is a killer
Most of the local "copper scourers" are copper plated steel
I tried making copper swarf in the lathe but copper is a bitch to turn and the product was not a success
I ended up buying 5 packets of two scourers from:
http://www.todae.com.au/redeckercopperscourer a few weeks ago
The current price is for a single but I paid that amount for a pair
It took 5 scourers to fill the column
I'm not sure how that price compares to what everyone else is buying but it was miles ahead of the US product landed here