Well, I decided on that Roll-X cover. I am going to try to relocate my factory rails to under the mounting point. I won't know if it's going to work until I ger the Roll-X. Paid $675 shipped from Autoanything in case anyone is interested. Amazon also has a vendor matching that price.

I don't suppose anyone wants to freecycle a set of factory takeoff rails to me for the price of shipping? If I am going to be modifying these to work, it might be nice to have some spare parts...