My name is Tom Murray. I have launched a few Raspberry Pi Kickstarter campaigns in the past, and am now launching another one for PI HATS. The product is called the SmartiHAT and it is currently on Kickstarter. You can use it to mount any Pi HAT with LEGO or screws. It's very versatile and comes with an extension cable. Some of the rewards come with a Pimoroni Unicorn HAT. I would for you all to take a look. You can even build a better Pi A+ case with it. Please check it out.
Kickstarter link - http://kck.st/1Ipdivq