Getting the image id of an uploaded model?

So, this really doesn't require code, but listen in...

What is the link to get the image version of an uploaded model? I want to get the image of this: Click link without having to upload the model image is a decal in my inventory.

I know there is a URL that can get the image of an uploaded model because BuildIntoGames told me there is, but he said it is secret because he is a greedy n3rd.