zinc salt bath

So. I just learned how to do the zinc salt bath for etching.
Basicly I need salt+cupric+hot water.
I need to find a company that will send me Cupric. I plan on looking up JT baker because that was the name on the bottle.

Zinc Bath
5 quarter Hot water
equal parts (250g) cupric and salt.

I can dispose of it down the drain according to my teacher.