Welcome to the forum!
This will help you with this and many other aspect of 986 ownership:
https://www.porsche.com/all/media/pdf/originalparts/en/E_986_KATALOG.pdf
The part around the ignition is called a "rosette" the part manual denotes the part numbers for different years, and colors, and with this part left hand and right hand drive (If you don't know your interior color, you will need to "decode" the option sticker on the hood, or under the driver's door (do a search for guides).). That said, if you have a non-standard color it's going to be pricey. My leather wrapped one was $400 last times I checked, but the standard plastic ones are a lot more reasonable. If you punch the part number into Pelican Parts they will tell you if it has been superseded by a newer number, the last two number may also change those are the version number. You can use the latest part number to shop for the best price. Most stores that make parts convenient to find charge more than if you use a part number.