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I've been using UltraSonic Acoustic Panels to line cabinets for a while now. They were cheaper than foam and you could cut them with a scissors. Unfortunately they stopped making them. I went looking for a replacement and found this product. https://secondskinaudio.com/acoustics/ecoverb $40 for 8 sq. ft. and free shipping.
Second Skin Audio also sells sound deadening automotive products including foil constraint layer mats.