Penny-pinchers , open source geeks, and people concerned with the longevity of sliding drawers rejoice! Upon the great recommendation of @Ethan_Spoelstra I have designed a drawer that is just a closed expansion card. Also, since I don’t believe this to be a transformative or significant advancement over the provided models, I’m giving the files away for free under CC 4.0! Enjoy.
If you don’t have a printer or would like to support me, I will be happy to print drawers for you (Not free, $2.50+shipping. Plastic, my time, and shipping, mostly shipping, costs money). Buy here!