Cool. I was leaning towards MYOG option too.
Spotted a UK company making them but not into the zippered toe box: https://valleyandpeak.co.uk/collections/sleeping/products/classic-quilt-standard
If you can sew in a straightish line, and can measure and cut fabric, they are very easy to make. YouTubers backcountry banter and reptar hikes both have good videos.
@Kurai started
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Cool. I was leaning towards MYOG option too.
Spotted a UK company making them but not into the zippered toe box: https://valleyandpeak.co.uk/collections/sleeping/products/classic-quilt-standard