See these great designers.

Overview of Bitcointalk Designers(Signature,Avatar,etc) Last Update: 1-Dec-2018

But I think you need to adjust your payment in dollars, increase it a bit so you'll get an excellent design. But try to negotiate to any of them on the list and probably someone would love to do it for you with that fee.

That overview has their portfolio's so you can see their designs and samples as well. Having a signature design + avatar, I think your 400 zeos tokens + $10 is insufficient.