From Markus' excellent site:
Ebner, Ludwig, active 1796-1806. Abbildung des königlich-Wirtemberg’schen Militairs. Ca. 1807. 24 plates. :
http://uniformenportal.de/index.php?/category/109
For other Württemberg uniform illustration of the period see:
https://repository.library.brown.edu/studio/collections/id_619/?q=Ebner
From the NEW YORK PUBLIC LIBRARY DIGITAL COLLECTIONS: https://digitalcollections.nypl.org/search/index?utf8=✓&keywords=Wurttemberg#
I posted an immage, cannot find it any longer, in case, can somebody identify this portrait
Ehmke, Ewe. Die Einsaetze der wuertembergischen kavallerie und Artillerie 1812-1815. :
https://epdf.pub/die-einsaetze-der-wuertembergischen-kavallerie-und-artillerie-1812-1815.html
Württemberg Uniforms by Stadlinger:
https://commons.wikimedia.org/wiki/German_Uniforms_Stadlinger
1811 uniform from: "Grenadier-Regiment König Karl (5. Württ.) Nr. 123 Geschichte des Grenadier-Regiments König Karl (5. Württembergisches) Nr. 123" Quelle: Wulf / Wencker, Metzlerscher Verlag, ohne Ortsangabe, 1889:
http://historischer-bilderdienst.de/images/r170-1_lbb.jpg
More from our dear Markus:
“Tafel von Fr. Schuler aus “Die ersten 100 Jahre des Ulanen-Regiments König Wilhelm I. (2. Württemb.) Nr. 20", vom Rittmeister Gleich, erschienen in Stuttgart, um 1909/1910.”
http://uniformenportal.de/picture.php?/3324
And if someone wants to check the Wurttemberg images in the "Uniformenportal" just go to http://www.napoleon-online.de/armeen_uniformenportal.phpd and choose "Württemberg" and afterwards "Bilder anzeigen" (no year needed to add).
If you click on the thumbnails you get directed to the image and category in the Uniformenportal.
Greetings from Berlin
Markus Stein
From Knötel:
https://de-academic.com/pictures/dewiki/75/Kn%C3%B6tel_I%2C_36.jpg
https://de-academic.com/pictures/dewiki/75/Kn%C3%B6tel_I%2C_26.jpg
https://de-academic.com/pictures/dewiki/75/Kn%C3%B6tel_III%2C_55.jpg
sounds interesting, the author also uses re constructions which were manufactured for the centential celebrations by various regiments.
Hilsenbeck, Joachim. Württembergische Kopfbedeckungen mit Uniformierung 1798-1918. Originalstücke und Zentenar-anfertigungen. Steinach-Verlag Reutlingen, 2012. 192 Seiten, 300 Abbildungen . :
To order:
https://www.vdmedien24.de/Wuerttembergische-Kopfbedeckungen-mit-Uniformierung-1798-1918-J-Hilsenbeck