Amsco, a maintenance supply company, sells replacement window cranks at AmscoUSA.com. It is also possible to buy cranks at Amazon.com or eBay.com.
Amsco sells a wide variety of window replacement cranks. If its website does not list a specific part, customers can send them a sample so that the company can match it. Amazon.com offers hundreds of different types of window cranks. A search on the website can be filtered by selecting brands or customer ratings.
The eBay auction site is a good place to search for replacement window cranks that are no longer available in stores. Consumers can usually choose to bid on an auction item or to buy the product immediately. Searches are narrowed by selecting condition, delivery options or item location.