Keepsake Quilting has YLI silk thread (hey, they're brick and mortar for me
). Single 218-yd spools in your choice of five neutral colors for $5.99 each or a collection of seven colors for $35.99-$39.99, depending on collection. YLI silk is 100wt thread. Bottom Line is 60wt.
http://www.keepsakequilting.com/prod...L20/Thread.htm