Corvette EFI Problems

[John Napoli]

I need info to solve two Corvette EFI problems:

1.  1985 Corvette needs a Mass Airflow Sensor.  New one is $500+ from a
dealer.  Alternate parts source wants in the high twos.  Is there an
alternative part that can be used that is less expensive?

2.  1988 Corvette with digital heater controls has a burnt main harness
(engine) from an EFI fire.  Can't find a source for this harness!  Dealer 
claims that it was discontinued in 1989.  ANyone know of a source for this
harness?  New or used OK.  Insurance adjuster has already stated that the
car should have been left to burn!!!

Thanks.

John