Often ,during our library maintenane we find we need bookends. If you're concerned about quality construction, The Library Store may be for you. They even carry a wide selection, all offered on one weblpage.
The Library Store mostly sells to larger libraries, but they should handle your purchases without a problem.
(https://www.thelibrarystore.com/category/bookends)
Brodart, at ShopBrodart.com, has an interactive book jacket cover wizard.
At the end, you'll see a short list of cover styles that best match your responses. Then just select your desired sizes and quantities based on the books you need to cover.
As the ShopBrodart site serves private book collectors it sells among other things supplies, including a broad range of the above covers.
(http://www.shopbrodart.com/bjcwizard-home)
