It’s been reported that Google is currently working on a new service called “Google Workshop”. The new service will allow users to customize their Nexus 5 devices with custom made cases as reported by Android Police.

The report also suggest that this service will only be supporting the Nexus 5 at the moment.
Users will have 2 options to choose from while customising on Google Play. Under a new Workshop tab, there will be a few options, from “MapMe tool” and to “Moments tool”. The MapMe tool will allow you to create a case based on a specific location, while The Moments tool is designed for the users to upload their own photos, and then, uploading more photos to create a live wallpaper to go along with your case.

There is no word on pricing or availability as of yet.
