Tinned Copper Wire.
What make of console?
Older Soundcraft & Studiomasters will probably be 22 swg TCW
Available from RS Components
www.rswww.com.
Part No: 355-079 which is a fine guage (approx 1mm dia)
If this is for a ground bus then you may need to use something thicker 16 or 18 guage.
Got to the RS site > Advanced search. Enter the RS part no above & you'll see their complete range of TCW.
No console manufacture uses solid silver buss bars (Too expensive)
Even top end Neve's or SSL's use copper.
The easy way to check if it's TCW is to either cut it or scrape the tin plate. You'll see the copper underneith.
regards
res