I posted once those links at the site, but will be better to have them in one place in separate topic.

125p:
http://www.motonews.pl/forum/?op=fvt&t=226959&c=5&f=12&start=20

Polonez:
http://www.forum.fsoptk.pl/index.php/topic,23430.0.html
+
Polonez 2000 DOHC was B01.EC.
Most of RHD Polonezes had "5" instead of "0" - B51 etc.