As of 2015 Oster replacement carafes are available at Oster.com, Walmart.com and BestBuy.com. The best website for this purchase depends on the model of the blender for which a replacement carafe is needed.
Oster.com offers a 6-cup glass carafe. However, according to the reviews, the corresponding lid must be purchased separately. Walmart.com offers both plastic and glass replacement options with accompanying lids. While Walmart's carafe is more expensive, the in-store pickup option is available, which saves the price of shipping. BestBuy.com offers a 5-cup carafe with a price-match guarantee. It is also possible to purchase refurbished parts from each of these sites in lieu of buying new in order to save money.