2×6 Bookmark Print-Ready Conversion

I have a finished double-sided bookmark design sized 2" × 6" stored as two high-resolution PNGs. Before I send it off to the printer, I need the files converted into a proper press-ready format. Only... (Budget: $30 - $250 USD, Jobs: Adobe Illustrator, Adobe InDesign, Adobe Photoshop, Brochure Design, Graphic Design, Illustrator, PDF, Print Design)