You might check with Woody (
http://986forum.com/forums/boxster-cayman-parts-sale-wanted/52469-parting-out-whole-lot-boxsters.html), but he has a $20 minimum. You could also post a wanted ad in the classifieds section. Members that have done the ashtray delete may pull theirs for you (I'll see if I can find mine).
Alternatively, if you look inside the center console, there's a good chance it's in there.