Bedsure Orthopedic Bolster Dog Sofa Bed with Removable Cover

Chewy.com

Rectangular shape matches exactly, Light gray color matches closely, Three-sided bolster design is highly similar, including the slightly lower front section, Apparent material (plush sleeping surface, slightly different bolster fabric) is consistent, Overall form factor and dimensions appear to match the bed in the frame

Heart & Herd Rectangular Twill Bolster Dog Bed

Lowe's

Rectangular shape, Bolster on three sides, Gray color

Bully Beds Orthopedic 3 Sided Bolster Bed

Bully Beds

Rectangular shape, Bolster on three sides