Yes they actually do! Some are made of maple, wood, etc. They come in a variety of shapes and colors.
Ikea sells all kinds of bookcases including, but not limited to, bookcases with glass doors. Just ask a salesman in your local retailer.
Staples is a great store for purchasing office furniture. Most of it is reasonably priced and they have a big selection of desks, bookcases and chairs.
The KraftMaid Cabinetry company unfortunately does not sell glass cabinet doors. They do however sell cabinet doors in many different sizes, finishes, and styles.
Anderson Windows does sell sliding glass doors, which vary in cost based on style, materials, and overall labor installation costs. Anderson Windows carries a wide selection of sliding glass doors.
There are many companies that sell tall cabinets with glass doors. Among the best are Target, Amazon, eBay, Overstock, Kraft Maid, Lowe's, and Home Depot.
There are several used furniture stores that may sell used sliding glass doors. Local contractors may also have leftover glass doors that can be purchased at used prices.
"Yes. Like most stores that sell bathroom fixtures, Home Depot sells glass shower doors, in addition to other accessories, such as soap trays, shower curtains and faucets."
Wooden bookcases can be purchased from many different stores and retailers. Some examples of stores that sell wooden bookcases include Urban Outfitters and Macy's.
staples
Amazon has a wide variety of barrister bookcases for you to choose from. I am certain you will find the product you need at the price that fits you best.
This site sells a wide variety of wood bookcases for people of all ages with different sizes, colors, and shapes.
Sauder bookcases can be sold on online auction sites such as Ebay or Craigslist. You may also be able to sell them on sites such as Gumtree or even at a local flea market or car boot sale.