20 Pcs Fold-On Archival Book Jacket Center-Slit Books Dust Jacket Covers Clear Archival Book Cover Protector for Librarian Collector (10" H X 21" L)

Sorry for the delay, here is one: https://www.amazon.com/Lerheedi-Protective-Hardcover-Librarian-Collector/dp/B0FWCHC4HJ/ref=mp_s_a_1_1?dib=eyJ2IjoiMSJ9.d4xg2TPigCU3YcIS4S_OTiMFmDFVWwGBAWIKGprm2JiciQVV1kQnBic_q1pP3WJGW2jDdVqhhd5vpMDDw0TRB2TgBtrNHTFy-xwWowuLJD2nXkwoE3s5gO-zK139NUv3R6zPpti8o3vre3lIyUESbey2i7hlbmTLBUCwhil9PD9eX942Um012wyWIwl9IoZ7tySXQ8MroxUUvgp23A0E0w.XJ1H6nAXoCC0DA03SYuWerP7SxgGcvsG58Qg627yt8s&dib_tag=se&keywords=brodart+book+covers&qid=1781400519&sr=8-1

Here ya go OP. A few different sizes on Amazon. https://a.co/d/07TORk9o