They usually categorize them as siamese and they look like they might have some snow bengal in them. It is hard to tell with kittens but I see about a half dozed in about a month's time in all the different rescue groups combined. Not a huge number, but until recently I never saw them appear.
http://siamese.rescueme.org/FloridaThey also have a bengal rescue page that usually has 3 or more pages of bengal and mix breed bengals. Some are clearly purebred (and beautiful!) and even early generation cats show up from time to time. For some reason that is not the case currently. There was a beautiful bengal yesterday but it is not on the page today. There are only three today and they look like big tabbies. Maybe they have all been adopted out after the holidays. There is a rather active bengal rescue group in Palm Beach, FL that has a lot of activity. They usually post here when a cat becomes available. If you subscribe, they will send you alerts for cats available in the state you select. It's interesting to see the activity. Certain states have more than others.
http://bengal.rescueme.org/Florida