Colorado Blue Spruce Slab – Collector's Specialty Woods
Wood slab, live edge board, wide plank, wavy edge board
Sitka Spruce Lumber – Hearne Hardwoods
Sitka Spruce Slab – Cook Woods
Oregon Lumber Works - Sitka Spruce
Amazon.com: ZEKOO 32in x 84in Classic Style Sliding Barn Door Slab,Solid Spruce Wood Barn Door Unfinished, Pre-drilled, Easy to Install Assemble, Interior Barn Door Wood Panel : Tools & Home Improvement