Here is the The Twelve Days of Christmas arranged by Brett Vachon. This is free Christmas Sheet Music for String Quartet.
This is an arrangement of The Twelve Days of Christmas, albeit with a more modern take. This arrangement by Brett Vachon for String Quartet cycles through many different keys.
The difficulty level of this arrangement is difficult.
The Score and parts are available to download. They are free to use without a licence for educational or non-profit purposes. I ask that you please give credit to the arranger during your performance.
Links for the PDF files
Click the button and download the full score and parts.