Have you gotten into active circuits yet? If so, perhaps a simple two stage audio amplifier. A FET input stage connected to a common collector output. Set the input Z to 100 K ohms and you have a nice little microphone preamp with a low output impedance. Depending on the design details, we are only talking about a half dozen components.
If not, then what about an impedance matching attenuator? Say a 600 ohm balanced input to 10 K unbalanced output minimum loss attenuator? It could be used to adapt from a phone line to the line input jack of an amplifier or recorder. If you go with this one, don’t forget to DC block it. To add a little sophistication you can even make it a band pass filter (300 Hz to 3.5 KHz) so it only passes telephone in-band signals.