Don't know if it's closer to what you're looking for or what I'm looking for (the Spanish version of your Irish black pudding), but I noticed that Le Moulin de Provence in the market has boudin noir. Haven't tried it, though--will post if I do. Let me know if you do!
I got lucky - went out today to get a pork belly to make bacon and they had a fresh batch of blood pudding just made today! Get it while you can because they only make it every 2 or 3 months and it does not last long each time.
Just had it on a toasted bagel with dijon and it was incredible!
Oh man! Real blood sausage finally! $4.20 for 3 huge pieces is just an insane price. I vacuum sealed 2 of them and tossed them into the freezer, and dug right into the 3rd one. Unfortunately the only thing I have to compare it to is the big factory stuff, so it should be no surprise that this is far better than anything I've ever had before. Well worth it.
Duckfat