Custom label template

I’ve had a vague plan to create my own labels for translucent caps once I’ve got things right (if that ever happens). I had a go at using the 1:1 PDF of the keyboard layout to extract key outlines, making them into vertical SVGs I could then use in a label template in a word processor. Unfortunately the outlines seem to be of the whole of the key, not the top surface so they’re not much use for cutting out labels that would cover the top of the key.

Is there any other way I could get the outlines of the top surface of the keys? They’re not flat, so it wouldn’t be exact, but maybe near enough.

I’m doing this too, but I’m just using a labelmaker on transparent tape and sticking the little stickers on the keys.