I am a beginner electronics hobbyist trying to follow an old schematic / instructions to build a theremin.
I have all of the pieces except one. This piece (Toko 154ANS-T1019Z) calls for a "68 µH, hi-Q, variable inductor". However I cannot find a 68 uh variable inductor at all (See link, all options are discontinued pieces which cannot be purchased).
Note: Octopart shows the part may be available when it is not. The websites Octopart uses show the part is unavailable. In other words I cannot find this part or any variable inductor with 68 uh inductance
How could I substitute this piece?