Hi
After some tests i've found a cheap PSU ( around 13.5 euros with transport ) to replace our old damaged psu :
Here are some photos :
i've kept the downpart of the old psu + button and connector ..
2 welds to extend 220v wires + added a earth cable and bent a side of the new psu in order not to touch the keyboard
Everything is working nice on 2 ST here
CU
C-Rem