I just finished the revisions needed to make the stock fan hub work. I should have one mocked up soon. We needed to loose about 1" out of the diameter of the access hole. This makes it a bit smaller but is still plenty of room to get in and access the gear.
I now have instructions done so if you are a good welder or have one close by I can send you the parts for a discounted rate. Saving you shipping and the core charge.