Permission to use SignFont image

Hi,

I administer the ScriptSource website, and our page on the [SignFont notation system](https://scriptsource.org/scr/Qaao) needs a sample image. Please could we use the image on [this page](https://aslfont.github.io/Symbol-Font-For-ASL/ways-to-write.html)? If so I will include appropriate attribution.
Many thanks, Martin