These are very common components in the classic car world. You just need to know the capacitance of the old one to replace it with one from a different car. I the past they were installed directly on distributors.
Barring that, you could buy any old capacitor that can handle the voltage and has the right capacitance and just wire it up. The biggest issue with using one that's not automotive grade will be the heat and disability of the wires coming off it, the leads on a typical through-hole component will be a little weak for automotive use. There may be industrial grade options out there, maybe McMaster carr has them, I haven't bothered to look as mine has held up fine for 31 years.