Hyde Definition’s PenCott patterns have developed a healthy user base and the patterns are generally available across a wide variety of gear but there are still relatively few options for plate and armor carriers. Thankfully, the industry is blessed with custom makers who can make whatever you need.
Dead Coyote Tactical Nylon works in the PenCott patterns extensively. They recently showed off a slick plate carrier design in PenCott BadLands.
The ability of smaller gear makers to fill in market gaps is just one of the reasons you should support mom and pop operations when possible.