Thanks for your response. At this point, the only insert specifically designed for controlling morton's toe is one from a company called pro-kinetics. It weights about 1.3 ounces, lighter than most orthotics. They've just finished the prototype, and the lift is about 3. 5 mm. But I'm not sure they're available for purchase yet. I think they're connected with a company that made inserts for walking shoes.
I just tried the new orthotics, and, sadly, the lift doesn't keep the big toe from collapsing, though it does control that more than any other device. So, other than a Dr. Scholl's moleskin pad, that may be all that's there.
Thanks for a great forum Ryan,