Where can I find a good designer for a small project?

I'm working on an idea and I'd like for someone with some design skills to work on the design for a single page of my app. It's a pretty simple form page, but it's the page which I'll be showing to customers. My design skills are fairly basic, so I'd like to find someone to clean it up a bit.

So my question is: is there a resource other than the typical Upwork for good design work?