Orange oil products feature d-limonene, which is known as a high-functioning (but not too toxic) killer of termites. Orange oil also is used in resins, cleaning products and even in fragrances. Fortunately, the product is widely available for use in preventing and killing termites.
Consult with a licensed pest control specialist. These people will be able to tell you whether you have termites, or if you home damage is the result of some other factor. These specialists also will be able to recommend proper treatment for termites, whether via orange oil or some other avenue.
Visit a home improvement store, such as Lowe's or Home Depot, as these major retailers typically feature a bevy of orange oil products, including convenient sprays and other forms. Consult with a sales specialist to determine the type of orange oil spray would best work for you. If by chance these major retailers don't carry orange oil, it's likely they'll be able to special order it or point you to a retailer that features such a product.
Shop online for orange oil, as several online retailers feature the product. Among the websites that sell orange oil for termite control are citrusdepot.net and escofoods.com.