I designed this tamper station to keep everything in one place.
This model will fit the De'Longhi Portafilter from amazon others might fit as well.
It is designed for a 51 mm Tamper, Portafilter, distributor and the aerator listed below:
The outer diameter of the portafilter is 61mm and the outer diameter of the aerator is 20.5mm.
I also uploaded a smaller version of the Tamper station with less filament used and only space of a tamper, portafilter and aerator.