A lot (well relatively) on Rennlist seem to be using these:
Porsche Refinished Silver Cerakote Semi Flat Hood Crest Emblem Badge | eBay
The last few on eBay haven't sold so you could probably get one for $99. if you have a ciore to exchange I think you get $25 back. My boxster is Ocean Blue and my steering wheel airbag emblem is silver, so I am thinking about getting one. I really like the brushed nickel one (not shown in this auction) but it is more expensive...
Steve