Last time I was there (about a week ago), Sam's had a handful of their bottles on the shelves (the Peat Monster, Flaming Heart, Oak Cross... maybe something else) and I'm pretty sure I've always found a bottle of two of their stuff at the Binny's in Lincoln Park or downtown. It might be worth giving them a call directly.
A quick check on their
website, incidentally, reveals that their Eleuthera has been discontinued! That one was my favorite! From their website:
Sadly, when the 15 year-old malt we needed was no longer available aged in re-charred casks, we decided to retire “Eleuthera” rather than overhaul the recipe.