Hello!  I am a previous 986 Boxster owner and during spring cleaning came across my old Brey-Krause R-3010 roll bar extension.  It was used for only one weekend because PCA required that I have it to participate.  It is pretty much mint condition and I want it gone since I no longer have the car and it is taking up garage space.  
I have listed it on Ebay because I am relatively unknown on Porsche forums but have good seller feedback there.  The auction link is here:
 Used Brey Krause 986 Boxster Roll Bar Extension R 3010 No Reserve | eBay
Used Brey Krause 986 Boxster Roll Bar Extension R 3010 No Reserve | eBay
Feel free to PM me with any questions! 
Cheers!