Electric Utility Meter Box Key

I just needed a replacement key for my outdoor utility cupboard for my electricity meter now I am having to do weekly meter reading got tired of using my fingers to unluck the door. 

If you print, please share a make, and let me know that it worked.

If I am more than happy to make changes to the model if your key is different as long as you can provide basic dimensions. 

There are no special printing requirements.