Want book cover designed

Have book "The Reasons for All the USA's Annual Federal Holidays" by Alan Bruce Clark PhD with subtitle "Highly-acclaimed book has Juneteenth National Independence Day! Book Recognized by Leaders in Washington, DC!" Need covers for Ingram Spark ebook and paperback/hardcover (8.5" by 11") that are as similar as possible to what is shown on Amazon. Amazon has rights to flag image on books sold on its site. However, have unrestricted, no royalty, public domain artwork shown on uploaded file and can provide ISBNs. Should be a quick and easy project to provide the two cover files. Cost to provide the cover files (already have the interior content files) for (1) epub and (2) paperback/hardcover?