There's a article on the xoutpost.com homepage describing a titanium trim install including a part number. http://www.xoutpost.com/articles/x5/i...heel-trim.html

Part No. 32306756529
This is the titanium color, as opposed to aluminum.

Here's another webpage describing a trim install with part numbers for aluminum and wood trims. http://www.my330i.com/mod4.php

Part Name: Aluminum Steering Trim (listed as "Cover")
Part No. 32301096827
Regular Price: $80.00

Part Name: Wooden Steering Trim
Part No. 32301096827
Regular Price: $80.00

Regards, Mike