Attached is the vector file as a .svg. Note your regular image viewer will likely not display it. If you open it in a browser you'll only see the house not the name as the browser has a white background. It will work on their site though.
Unfortunately there is no feature to share designs.
Joshua from printry.co.za says the following re sharing a design:
So if we can agree on a design, he'll do it for us and you can then just email him direct and he'll organise it for you. So can we agree on a small logo to the left front and none on the back?