Commission services like master building and mold design will always say SOLD OUT even when commissions are available. When commissions are open a link will activated in the listing to complete an order form. It takes only a few minutes and ensures that everyone has matching expectations before the custom order is sent to your email.
You can read through the individual commissionable items to get an idea of costs. Turn around time is usually 3-4 weeks but can be longer or shorter depending on order size, complexity, and what is already in queue.
Order progress can be tracked through the job tracking page.
A substantial discount is added for all wiki contributors using these services.