Under the product Attributes section of the product page you can select the attributes most important for your application and the Digi-Key site will look for additional parts with the same attributes as the product you are looking at. Here is an example of a similar part. As you can see I have selected three attributes. If I was to hit search at the bottom it will give me a list that could be potential cross with those same attributes. Unfortunately for part VNQ5027AKTR-E I do not have a cross with the same number of outputs and the same current output as the orignal part.
If you are not able to find a cross using these attributes please feel free to contact on here or any of the traditional contact methods.