A list of potential substitutes, if you can
Dyepot PS #33 - Dip Dyeing Yarn into 2 Colors to Create As Many Different Colorways as Possible
Magpie Fibers Dyed In The Skein
Alpenglow II — Drea Renee Knits
HF Sock Magpie - Simply Socks Yarn Company
Swanky Sock is a silky blend of merino, cashmere and nylon with beautiful drape and sheen. It's unbelievably next-to-skin soft and is perfect for both
Swanky Sock - Magpie Fibers
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Ravelry: Alpenglow I pattern by Andrea Mowry
The Uncommon Thread, Posh Fingering // Twig at The Loopy Ewe
Ravelry: Magpie Fibers Dyed in the Skein
Magpie Fibers - Quartet Worsted – The Knitting Loft