Found this lot whilst searching for DBX II codes for a completely different application. Haven’t had chance to go through them in detail but they may be of some interest. Just type in DBX codes in Google and you will find lots more. Anyone would have thought I typed in paper clip.
http://www.gendan.co.uk/product_ENGPRO.html
http://autorepair.about.com/cs/generalinfo/l/bl_dtcs_main.htm
http://autorepair.about.com/library/ts/obd-i/bl-dtcs-90.htm
http://www.obdtools.co.uk
http://www.gendan.co.uk/category_1.html
http://www.digimoto.com