I got these last week from andivic, after he was able to find a center section to match the corner lights he'd had. I didn't want to tint the center, so I'm glad he was able to get a genuine part.
This is a very simple job, and it took me less than an hour going at a slow pace. There were no issues at all with wiring, though the center wire might be a little shorter on the JDM lights than the USDM, but that didn't affect the ability to connect the wiring properly. All connectors were identical and everything fit perfectly. To top it off, there were amber bulbs in the corners, something that I didn't expect. Not sure if they're that way in Japan, but it saved me some work I thought I might need to do.
Super wrapping, courtesy of andivic:

Stock lights:

Stock vs JDM corner:

Stock vs JDM:

Empty corner:

Amber bulb!:

Closeup of JDM corner vs USDM center:

Install done:

Looking great now!:

The effect is nice, and it makes a larger difference than I expected. Even non-car people noticed and appreciated it. Pricey mod, but subtle and attractive.