The P-C70-OSC may be hard to find. In these video you make the oscillator coil.
MOSFET AM Transmitter Home Made Oscillator Coil
https://www.youtube.com/watch?v=8jV5rfc-QhA
MOSFET AM Transmitter Home Made Oscillator Coil PART II
https://www.youtube.com/watch?v=RmRXnimNx58