Oat,
Just read post about your sewing machine. Love it. My husband worked for Wesinghouse for over 30 years. At picnics & Holiday parties, small appliances with the W name on were given as door prizes. Most were well made, we still have a couple around here. Some of these were mfg. by someone else with the W name on. I have never seen Free Westinghouse, however. Some were made by GE or RCA. Also for many years RCA made Sears products, you might try looking under Kenmore, which is Sears brand.
Hope this helps. And all this because you were looking for lego fabric.