When I bought my LS I was told that you can override the need for the code, I am not sure if this is the info that you need but it might be worth a try.
I have not tried this myself, it came on a seperate piece of paper in my Sat Nav and Stereo instruction book.
Turn the ignition switch to the ON position (combination meter warning lights illuminated)
While pressing CLIMATE and AUDIO switches simultaneously, turn the HEADLIGHT CONTROL SWITCH in the following sequence:
OFF~SIDE LIGHTS~OFF~SIDE LIGHTS~OFF~SIDE LIGHTS
The SYSTEM CHECK will become displayed on the screen. It will take approx. 30 seconds for the check to be completed - the display will change from CHECKING to OK
Once all the function checks display OK then press MENU. The DIAGMENU will be displayed
Starting with the AUDIO button, follow the sequence:
AUDIO~DESTINATION~AUDIO~DESTINATION~AUDIO~DESTINATION
The SECURITY menu will be displayed. Using the numeric keys enter 440215. Press ENTER
The displaywill return to the DIAGMENU. Switch the IGNITION SWITCH to the OFF position. The security code is now cleared - the unit will operate normally.
PLease ensure that a new security code is re-entered with the customers knowledge.
As I said before I have no idea if this will work, maybe you can let us know how you get on...
Redsteve.