Here are simple versions of all the Ull shields, in PNG and SVG formats. Attaching them to this post. Or you can download them here:

PNG versions (2.4MB):
https://annabmeyer.com/Downloads/Heraldry/Ull%20Simple%20Shields%20PNG.zip

SVG versions (1.7MB):
https://annabmeyer.com/Downloads/Heraldry/Ull%20simple%20shields%20SVG.zip