I have looked into making a vector version of the eye, both cardback version and the other style that appears in the title, and I had no luck. The technique I tried was to convert the jpg directly to a vector using Inkscape's built in tool. Technically it does work but it didn't give me what I wanted. Especially the cardback didn't work because its just a painting. There's no way to grab "lines" from it. I've tried to clean it up into neat line art and it just doesnt work.
Though I imagine someone with actual artistic talent and understanding of digital art software would be able to do better than me.
Anyway, here is what I had and could make quickly. There is no option to upload .svg files to CoE or to imgur or something. But I could email you.
For the 3rd one, there is no way to remove the black background because of the way the paths are that will change the black/white coloring or other parts of the image and mess everything up.

- MECCG svgs.png (294.65 KiB) Viewed 3475 times