You could use Drops Kid Silk haze as a substitute.
Small cowl: Shown lower right: 1 skein Rowan Kidsilk Haze (229 yds/210m), Color 597. Or approx. 229 yds/210m of an equivalent lace-weight mohair yarn.
Large cowl: Shown lower left: 2 skeins Rowan Kidsilk Haze (229 yds/210m each), Colors 659 and 600. Or shown lower center: 1 skein Rowan Kidsilk Haze Stripe (460 yds/420m), Color 357. Or approx. 458 yds/419m of an equivalent lace-weight mohair yarn.