DW and myself often discuss what things we can get here that we wouldn't be able to in the US, and what I would miss. I know I would miss pork pies (from the butcher, not supermarket), and those aren't easy to make at home either.
Today watching a cookery programme and they were using black pudding, so she said that would be another. I wouldn't miss that as it's very rare I have any, just if staying in a B&B and they have it with the English breakfast, but it might be a case of wanting some purely because you can't!
So got to looking online to see if it's available in the states....specifically on the east coast. Found a couple of Irish pubs in Philly that include it in an Irish breakfast.