Hi mudfkr,

today i ve ordered the things i need to fix it.
All the stuff (housing+3rd) are from a  SQ625-T3 M/T  which model also use the air pump for frond locking.
The code 27450-78E00 wasn't available here now so i ve ordered the full system from the V6 GV with the frond air lock, as mine has air pump for locking the diff too.
Hope that it will be ok with no mods/drill need to do.
I have 26 spline shafts so its ok.
Thats the model's diagram from which ive ordered the things.


Thanks for helping me and i ll be back with any info available 

Well,

the damage wasn't only the housing but also the ring, carrier, and the left frond shaft which "runs" into the housing 
i bought them all new and i started to match them..... 
Finally thats the result....   but as i,m thinking now, i made a mistake maybe.... i had the chance to order a Calmini frond LSD.....  but i didn't 
Anyway, i ll do it when i ll decide to lock the rear too.



Thank you all for info and help 
Vasilis.

Nice, glad you got it all sorted.