Convert Logos to High-Res

I already have two finished logo layouts—one stacked, one horizontal—plus a favicon and a small set of icons. The artwork works fine for on-screen use, but the resolution is too low for large-format printing and other professional applications... (Budget: $10 - $30 USD, Jobs: Adobe Creative Cloud, Adobe Illustrator, Adobe Photoshop, Graphic Design, Illustrator, Logo Design, Photoshop, Vector Design)