As with darn near everything in this industry, apparently another subsidiary of Lippert.
"July 20, 2011
White Plains-based Drew Industries Incorporated (NYSE:DW), a major supplier of components for recreational vehicles (RV's), reported today that its wholly-owned subsidiary, Lippert Components, acquired the assets of Elkhart, Indiana-based M-Tec Corporation ("M-Tec") for a consideration of $6 million in cash. M-Tec- who reported annual sales of approximately $12 million - manufactures a bespoke RV Unibody Chassis (up to 45-feet long), metal frames (including a through frame slide out), stamping, and other components for motorhomes, travel trailers and mobile office units..."
M-Tec news release