I have now added the shop unit lease process, and a stock order process.
The stock order process calls a delivery lorry, which backs up to your shop unit and allows you to pick custom containers. Currently Bottles, Jars, Cans and Boxes.
I have also added a contents picker, and a stock editor. The contents pickers allows you to drag contents (textures) from a side panel onto the relevant container 
https://ukcpg.co.uk/virtualshop
Next process is to allow you to change and add posters to the shop unit walls.
Also need to come up with a interesting virtual way to enable a payment gateway.