I con understand the concern with the muslim as I'm quite sure that Haggis are not necessarily Halal but the MacSweens vegetarian one is a good call.

Now I'm trying to rake my brain for what else in available...of course having lived in Scotland for almost a decade there are so many local varieties that I have tried, but I'm thinking of what is availale over the shelf (and not in a tin).

To think of those poor Haggis running free and then sold in a cylindrical tomb