What meats could be used in place of haggis?

I'm trying to make some Ironforge Rations from the World of Warcraft cookbook (nerdy, I know), and the recipe calls for a 15oz can of haggis. Problem is, I can't really find any haggis in stores near me. Can anyone recommend an alternative to haggis that I can use in the recipe, or know of somewhere online I can get decent haggis? Thanks in advance!