I made this to hold either one or two of these mini-purifiers to put next to your printer or in its enclosure. I recommend using mounting tape or command strips to secure it in place. Scale up 1 for a looser fit.

https://www.amazon.com/Anycubic-Purifier-Lightweight-Activated-Printers/dp/B09QW76L33/ref=sr_1_3?crid=Y2E6E6VT788S&keywords=fdm%2Bair%2Bfilter&qid=1693491488&sprefix=fdm%2Bair%2Bfilter%2Caps%2C111&sr=8-3&th=1