I needed to digitalize some old books from my library, and after seeing the solutions offered by the web, I decided to make my own with minimal cost and time sparing.
Ikea Drommar Cookie Sheet 6.99 USD
Extendable Handheld Telescopic Self-portrait Tripod Monopod For Camera from Banggood and other sites for 4.60 USD
1/4 Inch Dual Gold Nuts Tripod Mount Screw To Camera Hot Shoe Adapter from Banggood and other sites 1.92 USD
You just have to drill a 6mm hole in the cookie sheet, insert the shoe adapter with the nut to fix it and screw the tripod...DONE!