L2 is a variable inductor. I have never seen this piece for sale on Mouser, Farnell, Digikey,...
Digikey sells variable inductors but as far as I can see, not one that can replace L2
If the plastic isn't broken, best chance is to look for a replacement coil.
However if you say that the coil has fallen out, the platic tube is probably damaged.
Best chance is look for a cheap/faulty Analog board from an 128K to SE30 and desolder the L2 variable inductor
Digikey sells variable inductors but as far as I can see, not one that can replace L2
If the plastic isn't broken, best chance is to look for a replacement coil.
However if you say that the coil has fallen out, the platic tube is probably damaged.
Best chance is look for a cheap/faulty Analog board from an 128K to SE30 and desolder the L2 variable inductor