Thanks to Sgtgigglebox for the detailed information. I was able to replace my grills in about 15 minutes. Thanks to ZVier for the smooth transaction in buying these from him. btw, while I do have holes in the front fascia from a euro plate the previous owner drilled, those aren't scratches you see...they're reflections from some paint on my garage floor.
I used these trim removal tools I purchased from Harbor Freight. I used both on the first grill, one to hold the grill out while I slipped the second one in, because I wasn't sure what to expect. Once the tabs popped loose, I only needed one tool. Taking the second grill out took me half the time since I knew what to expect and I only needed to use one of the tools.