Yes! Sign up for an account as an author, and select the "Upload Audiobook" option when you create a new project. Then you'll be able to upload all your own metadata, art, and audio files.
Findaway Voices does have and enforce Asset Guidelines to ensure a high-quality standards across all our distribution options, so please make sure you keep these in mind when you're recording your own audiobook. There is no fee for uploading your own audiobook, but all our distribution fees and terms do apply.