elDalvini

I found this model to hang hot wheels tracks. You could use that or take the dimensions from it (use something like the measure tool in prusaslicer).

The dot commonly marks pin 1 of a part, whatever that means for a capacitor. I have never seen a polarised capacitor that is smaller than a microfarad. When choosing a replacement, I would go with an unpolarized capacitor. Even if the original was polarized, an unpolarized one will work.