I have a problem,well a question

I have a beosound century and a beosound ouverture, and the gliding mechanics need to be re-greased, in the service manual that i have from my system they refer that i must use Barietta grease L55-3, were can i find it? well googeling didnt gave the hoped result. Or is there a better option? I dont want to try just something because i dont want to destroy the gliding mechanics because it's plastic and not all greases are to using with plastic gliding mechanics.

thanks in advance.

btw the part number from B&o is 3984030