Moog Etherwave repair and acquiring variable inductor or make modern replacement

Hello, what a great place this website is, I've been reading threads about repair and am already learning a lot of new stuff! The reason I ended up on this website is that yesterday a Moog Etherwave (rev H) found it's way onto my workbench for a tuning and service job. I have been playing with making simple electronics for music and art installations and never really had to work with inductors. What I found was that one of the variable inductors was broken, or well, the ferrite core was shattered and what I gathered so far is that it is part of the volume oscillator circuit. According to a schematic I found this part, L11, is a 47uH variable inductor and what I read on this forum was that replacements were last found somewhere in 2009. And I also read that some people make it them selves? I have been gathering old, broken, radio circuit boards and started gathering similar parts to have a go at it with what I can find but I was hoping someone here would have a solution for this issue.