I've a Fused Filament Layer 3D printer and have used both PLA, ABS but I'd wonder about the weight handling of the item first, however have a number of ears left over from some DELL nodes and I wonder if you could repurpose them too.
Definitely give FFL or SLA a go first though because it's such a simple shape and it would not take to long to rapid develop or print out.
Nice idea!