850R Parts

[JW]

I have a 1996 850R Sedan and am looking for the following parts as
mine have died one way or another:

-Alpine stereo data cable
-Antenna
-Driver front wiper arm
-Front driver's seat (or heater core)
-Rear passenger's ledge speaker

Short of calling many junkyards one by one, is there a more easy way
to get these parts without being ripped by Volvo?

Thanks.

-JW