After rolling screen, I tried my own take on the foam block mod. Try at your own risk. Most people used a sponge or something like it. I used Sorbothane sheets. I had leftover from another project, but you can find something cheaper I'm sure.
Amazon Sorbathane -
https://www.amazon.com/gp/product/B004LYGH3U/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
