All you need is a 2 or 3 liter soda bottle, a ball of steel wool, and you can plate the steel wool with the silver in the fixer. This is what I've been doing for 10 years, nothing exotic. I add some steel wool each time I retire another half gallon of fixer, and the remains of the previous batch go down the drain. Someday I'll do something with the residue, perhaps give it to a local photo lab that already recycles. Must be a few dollars worth of silver in there.