Crystal and resonator frequencies which were ubiquitous 25 years ago, when most communications were still analog, have become mostly obsolete now.
Back in those days, one would find 3.5795 Mhz (chroma) crystals used everywhere. Although still available, their usage is rapidly declining...it would not surprise me if they become obsolete in the near future.
If you can still find 38Khz crystals use a PLL with a flip-flop on its feedback, to multiply the frequency by 2.