The factory style header is more convenient, no doubt. And while we are finally able to start selling a version of that in our aftermarket tops, they will not be compatible. The factory-style header attaches to the fabric with a bunch of little screws, and is a totally different design for the fabric and the header itself.
Our current JK header did use clamps, but we changed, due to complaints about tightness. You can call 800-845-3567 to see if our support team has a retrofit. I think they were doing it the other way round for a bit, sending out knobs to people who had clamps.