Poke around some expectable Chicago places.
I bought my first--and only--bottle of leatherwood honey up in one of the many interchangable fruit stand cum knick-knack stores in Door County years ago. R. Stephens, Mole Creek, Tasmania. It was and remains the oddest tasting honey I have ever had. I don't think I can possibly identify the flavor in any conceivable way that would be helpful. I can say that I didn't particularly care for it. The label was so colorful and striking that I kept the bottle, which I still have, as show-off storage for miscellaneous food items.
Then, one day not so long ago (perhaps within the past six months or so), I remember searching for my favorite honey (Attiki thyme; the richest, darkest, most incredibly flavorful...don't get me started). Not surprisingly, I didn't find it where I was, but I remember being startled to see the same bottle of leatherwood honey produced by Mr. (Ms.?) Stephens on the honey shelf. I am reasonably inclined to think that it was the Treasure Island on Broadway, but I am not certain of that. But I am sure that I saw it in Chicago in the past year. I realize that this is little practical help, but perhaps some quick calls to the usual suspects might turn up a source.
Good luck--I'll be curious to know what you think of the flavor.
Gypsy Boy