Okay I got some bad news for you and maybe some good...
I checked every manufacturer I could find and no one, including Putco makes them for the dually because of the curve in them.
The good news is that I also talked to a manufacturer in Salt Lake City about them in February. He said that they would be getting a new CNC(?) machine in June that has a laser to cut the curves, and was planning on making the dually bed rail caps.
If he comes up with anything, I'll post it here but I'm not going to bug him about it until June.
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