you could try All Electronics Corp. for a variac. They have a 10A for $135.00 and a 5A for $95.00 Vin 110-120VAC here is the url to there variac page: http://www.allelectronics-dot-com/cgi-local/SoftCart.exe/online-store/scstore/c- Variacs.html?L+scstore+rbrn2120ff836083+976705062 Kevin D.