It appears to have never been sold in America. I did this search and came up with some original ideas that might help you.
https://www.google.com/#q=lego+fabri...evid=586539657
There was this auction in Japan. Half a yard sold twice for $12.35.
http://cgi.ebay.com/ws/eBayISAPI.dll...m=291012257631
One of the color pictures had fabrics with white circle looking like the top of legos.
https://www.google.com/search?q=lego...ml%3B570%3B407
The site is called
www.theboytrifecta.com