I wanted to share my latest front plate solution as well, similar to what
S4toM3 has done (and where I got the idea!).
I ordered custom plates from customeuropeanplates.com and tried to make them look like they would if they were legal (of course I know they are not). I went with the Missouri style + navy blue text on white (matching the state-issued plate theme) and my letters. It turned out well and currently I'm just using double-faced tape to mount the plate. The holes that are in my bumper dictated the placement and I wanted to be able to remove it if I didn't like it, but I've received lots of compliments (and questions) on it from folks.
Here is how it turned out for me:
I also switched to my winter setup with Michelin Pilot Alpin PA4 tires in the OEM size that fits the 666M wheels, which I'm quite happy to be able to run year-round!