Norma used also a BMW engine in the past. See:
http://perso.wanadoo.fr/sportracer/N...%202000-01.htm
What I understand (I speak no French) that it's a 4L Mader engine base on a BMW M5 engine.
Ascari used an BMW engine in 1 of their cars. But it was not a success.
Also Debora used BMW engines in Sportscar Lights/LM675 class.