Saw blade manufacturer Contour Saws near Chicago, Illinois has what was at one time a large in house heat treating department consisting of a number of top loading Lindberg vacuum annealing furnaces. Their process requirements changed over the years with the result that all of the furnaces have become surplus. There is a limited market for this style of furnace but all 12 of the furnaces are in good condition and in need of a home-if you have an interest we would be happy to put you in touch. Interesting company by the way, one which is steeped in history going back to the 1940’s.