I frequently buy all of my acrylic as remnants from (somewhere I won’t tell you because I don’t want you buying it instead of me).
There’s some other pieces not pictured, so all together it’s roughly about 12 sheets worth of various thicknesses of cast (from 1/8” to 1/4”). Tons of 3/16”.
If you work with acrylic, find yourself a company with scrap. It works out well and really makes for a symbiotic existence.