Need clarification. Pics or access to the uninstalled set?
I'm not even sure what type of composite Rudy used, it's similar to plaster paris. That's the reason the installation taps break, there's no flexibility in the tabs due to the composite they were molded in.
Whereas the OEM plastic grill and tabs are molded in the same type of plastic but the taps still have a little flexibility that allows for repeated installation or removal.
Also, Rudy design is two parts*. The outer recessed inset grill with molded in tabs, and the inner separate hexagon grill. Which is why you either have to use silicon or fine screws to hold them inside the outer recessed grill.
*four actual pieces. L/R recessed grill, plus L/R hexagon grill.