Flawless Signature & Stamp Cutout

I have a JPEG image—of a handwritten signature with an ink stamp—and I need every trace of their existing backgrounds removed. The files must come back to me as high-resolution JPEGs with a pure, uniform backdrop so they drop straight into printed documents without any visible halo or artifacting... (Budget: $10 - $30 USD, Jobs: Adobe Photoshop, Background Removal, GIMP, Graphic Design, Illustrator, Image Analysis, Image Processing, Image Recognition, Photo Editing, Photoshop)