title: Relational Dropdown/Select product attributes in Magento backend
body: <p>I'm developing a Magento store for a vehicle accessory company. There are a number of vehicle specific items that need Make/Model/Year attributes, however I can't find an extension that allows creation of relational attribute dropdowns - I need three dropdowns, whose options change dynamically depending on the previous dropdown selection, for example:</p>
  
  <p>Dropdown A has four Vehicle Makes. Choosing a Make then populates the Model dropdown with a specific set of options and so on for the Year dropdown.</p>
  
  <p>Is this possible in Magento? I've looked at some of the Make/Model/Year extensions, but they're all text inputs - too much room for input error by staff members. I've also tried VehicleFits but it isn't working/throws a lot of errors and it appears development has ceased.</p>
  
  <p>I've searched high and low, any help would be greatly appreciated.</p>