This fits the Flair Neo. There's a less wiggle room than the stock tray. The grate fits in just as a press fit, and it just takes a light pull to remove for cleaning.
I printed it in Creality Black PLA and it's held up really well for the last 5 months. I rinse it off with hot water after every use. I haven't seen any buildup of grossness, so even though it might not be food safe by the strictest standards, as long as you don't drink out of it I think you'll be OK.
Print the grate normally, the bottom has a nice sheen so I keep that side face up.
Print the bottom with supports. I used ironing, but IDK if that made the buildup any better.
I think it'd look really well with some space grey PETG or maybe some red to give it some flash and match the portafilter.
The author hasn't provided the model origin yet.