Meg at olliegraphic recently designed these cute custom invitations for a magic-themed birthday party and a fire station birthday party. I love how they both turned out! You can view more examples of Meg's custom work here.
If you'd like to commission Meg to create a custom illustration for you, you can then have it printed on any of the products that I offer through the custom section on my website. Please feel free to contact Meg or contact me with any questions!