I've been using this, 40 ft for $20.
https://www.amazon.com/BANLTRE-Transparency-Template-Material-Stencils/dp/B0C3ZKCFKB/?tag=fabo03-20
I also "nutserted" the window so I can easily replace the protector instead of halfway crawling into the dusty, dirty cabinet!
View attachment 1716420441
View attachment 1716420442