Found this on amazon and didn't see why it wouldn't work as an etcher. But wanted to get you guys opinions before pulling the trigger. Both state ac/dc outputs and variable voltage and the second is more money but more amperage.
http://www.amazon.com/gp/product/B0002DT0GU/ref=pd_luc_rh_sbs_01_04_t_ttl_lh?ie=UTF8&psc=1
http://www.amazon.com/Variable-AC-P...ref=lh_ni_t?ie=UTF8&psc=1&smid=A15QN6QABYC6HS
http://www.amazon.com/gp/product/B0002DT0GU/ref=pd_luc_rh_sbs_01_04_t_ttl_lh?ie=UTF8&psc=1
http://www.amazon.com/Variable-AC-P...ref=lh_ni_t?ie=UTF8&psc=1&smid=A15QN6QABYC6HS