If you are still interested in finding high sugar content honey locust, maybe this will help maybe not.
So from my understanding you can somewhat gauge the sugar content based on the pods themselves as each tree seems to produce pods with different characteristics. From my limited understanding is that the area on the opposite side of the seeds are where most of the sugar content is located, so the bigger fatter that area equates to more sugar being available in that pod vs one with a narrow area opposite the seeds
So with that information (whether true or not) I set out to locate a tree that produced pods with that in mind. I looked throughout Utah in remote/rural places where I felt fairly confident no chemicals would be used. It quickly became apparent that the pods produced by each tree definitely had unique characteristics and I started grabbing samples from possible high sugar content pods with little to no insect damage. Some did have a little more "fat" than others, although they did not really look like what I had seen as examples for high sugar content pods I was in search of. Untill... Just the other day after I had given up my search I stumbled on some very promising pods that looked exactly what I envisioned, so I grabbed quite a few in hopes that some other of these seeds (I know not all of them would) you will be trees that share that same characteristic as the mother tree. Another thing that has me hopefully is that they looked as though they have recently fallen and most had very little to no insect damage and I know there are no chemicals used where I found them.
So with al of that being said I would be more than happy to share some of those seeds, pods, and/or some of the other not so promising if so desired.
Although I am a long time lurker I do not post much (if ever now that I think of it) so am not sure how to post photos or if I am allowed to share a link to a photo (& frankly I'm to lazy to look up the rules rn).