Forum:Isometric Block Image

I am trying to make craftng recipe images for my Minecraft mod wiki, but I'm running into problems with the images. I am using the Template:Grid/Crafting Table design and I need to put a 32x32 image of a block "as seen in the player's inventory". What is the easiest way to get this isometric block image when I am using blocks that my mod added? (i.e. I won't find them on Google)