Wayfair offers Bernardston 33.75" W x 51" H x 9" D Solid Wood Free-Standing Over-the-Toilet Storage (Espresso) for $65.99 (orig. $175.99) with free shipping.

Product Description:
Bathroom a bit short on space? Make the most of your square footage with this over-the-toilet bathroom space saver. Crafted from solid birch wood, this freestanding piece features six smaller side shelves and two wider upper shelves that provide a place for towels, toiletries, and more. A neutral finish helps this design blend with a variety of color palettes and aesthetics. Assembly is required.