I didn't notice that, but looks like even the OEM one's have TRW stamps on them, here is a link to just the OEM wishbone kit, which has the same stampings mine has.
http://www.ecstuning.com/BMW-E92-335..._Arm/ES257208/
I can take a screenshot of my order details page from ECS that shows these are the OEM one's and not the TRW one's if anyone is interested. PM me and I can send it to you.