Hah! Well obviously I knew it wasn't a "traditional" Irish dish, otherwise it would be readily available here, which is why I was asking this question to begin with. I also looked into curing my own which does look simple enough, except most recipes call for saltpetre (which is unavailable in the uk) or some other curing salt, which seems difficult to get. Apparently the only need for this ingredient is to give the roast that bright pink color, but it would be nice to get my hands on some if anyone has any ideas. Thanks for your comments, very helpful!