You can get acryllic sheets for like $2-5, get a dremel, some sandpaper (different grits, from rough to fine) and a jigsaw/hacksaw, drill, and some rivets and a rivet gun. Can be easily done for under $7 assuming you already have the tools.
My dad has been a mechanic/handyman for over 30 years so I have many MANY tools. Those all seem accessible at this point, where can I grab an acrylic sheet from? online or in store?