[Yaesu] Looking for replacement for uController of FT757, rig is dead!

[Marina]

Hello,
suddently, after a very dry and windy day my FT 757GX switches on no more.
Now, after nights of verifications and substitutions the only peace of 
hardware giving signs of misfunction is the main uController.
It is the Q67 marked SC82088 but listed as MC146805G in parts list.
Yaesu delivers this part no more.
Anybody out there with a spare or with a broken FT-757GX or local unit board 
to get the uC from?
As a last resort a copy of the firmware would be also a solution but this will 
be as impossible to find, so far I know.

This RTX is one of the last where one can put his hands knowing that there is 
a chance to get it repaired or upgraded with common components (excluded if 
the uC or the display are blown). 

Thanks for any help.

Marina.