Oh yeah! FleaBay:
http://cgi.ebay.com/ebaymotors/New-Porsche-Carrerra-996-Boxster-911-Ignition-Switch-OE_W0QQcmdZViewItemQQcategoryZ33576QQihZ015QQitemZ 250080239550QQrdZ1QQsspagenameZWDVW
The stealership won't sell you just this part. From what I've been told, they tell you to replace a lot more and it costs hundreds of dollars. This is all you need though.
Mine went out at 84k on a 97, although I had different wierd things happening to the car... my AC wouldn't work, then my windshield wipers stopped working, then the windows didn't operate, etc. It was freaky.
BTW, you can jiggle the key and while pushing it in hard and probably get it to still work if you are in a pinch again.