^Unfortunately it's a bit more difficult to find people for stuff like this these days.
A few of the more-popular aesthetic artists (like Thretris) retired from the scene a while back, and we lost a pretty decent-sized chunk of the chip community when 8bitcollective was finally shut down.
Not that the community hasn't built itself back up or that it isn't better for it, but it's definitely different.
Anyway, I've replied to your PM and once I get some more information from you I'll likely end up sending you a mockup image to make sure you know exactly what you'd be getting, and if I can't nail the exact style you want, I definitely suggest hitting up the Chiptunes = WIN Facebook group. There are plenty of great people over there who'd definitely be able to help you.