A list of potential substitutes, if you can
Ravelry: YarnStories Linen 4ply
Waxed Irish Linen Thread 4 Ply - TinkerCrafts
Zweigart 27 Count LINDA Evenweave Fabric
Ravelry: YarnStories Linen 4ply
Zweigart 18ct Floba Embroidery Fabric
Ravelry: YarnStories Linen 4ply
Waxed Irish Linen Thread 4 Ply - TinkerCrafts
Make DK Yarn, Highland Wool, Alpaca & Linen
Ravelry: YarnStories Linen 4ply
Yarn Stories
YarnStories
Ravelry: YarnStories Linen 4ply