Try some used office supply places or businesses surplus stores. Many years ago, my wife's employer got rid of some rather old office supply cabinets. Steel construction, heavy as heck, about 3 feet wide, 2 feet deep, and 4 feet high. Two doors, adjustable shelves and I think she paid $10 for it . It's not pretty but it sure works for me. We've had the cabinet over 20 years and it's none the worse for wear. Looks a lot like Lost Pup's, but it's an ugly gray paint job and there is a lock, but the keys are long gone.