How to assign orders to the nearest fulfilment center automatically?

[ParcelNinja]

Hi all,

We have multiple locations with stock. 

We use the fulfilment logic based on priority, but would like some added complexity by routing the order to the nearest fulfilment centre. 

I've searched for apps, but cant seem to find any which will automatically re-assign a fulfilment to the nearest location.

Anybody got a solution for this?