As promised this is a functioning part that replaced the Zortrax HEPA-Carbon filter. This can be used with the AirManager2 that can be found here: https://www.prusaprinters.org/prints/16996-airmanagerv2-recirculating-air-filter-for-3d-print/comments
Its is really easy to construct and all you need is some activated carbon that sells for 8 euros per KG and a bag from a vacuum clear preferably HEPA.
I have printed the part in PETG 2mm.
You will need 4 M3 20mm screws with nuts.
1 HEPA Vacuum cleaner bag and some activated carbon sold on amazon or a local store.
The author marked this model as their own original creation.