found a link that points to a beverage despencer that will make a good
etching tank. i found on at a garage sale and traced the manufactuer
down.will have to be cut down to the size you need.it is 2' wide x 9
deep x 16 high, they also make a smaller one.
thought this might be helpful.
mebo
http://www.arrowplastic.com/beverage1.htm