Sorry to break it to you Padraic, but I don't remember ever seeing any of those on the beer lists at work...
Sam Smith's one is excellent, I'm lucky there's a Sam Smith pub down the road from my folks' house in Durham, so I always have a good few any time I'm back home. For some reason none of the importers bring in Sam Smiths stuff at all...the brewery prioritises shipping their goods to the states I think. It's a big shame to be honest. Will try and bring you a bottle back next time I'm home.
Your best bet would be the Rogue Shakespeare Stout - plenty of that about at the moment, and there aren't too many better oatmeal stouts out there in my opinion.
Cheers,
Alex