Hinge pins and bushings same entire line for body style so thats from about
82 till
93.  Window switches are generic across the entire GM line, I've used them
out of cars as well as trucks.  The actual look of the "rocker" may be
different but the wiring conections are the same and the outer dimeinsions
the same.   Door handle spring more than likely going to be wrecking yard if
dealer cant get.  Turn signal switch is generic across the Chevy both car
and truck as well as GMC line from 86 to 93, with tilt wheel.
Learn to use autozones and NAPA's online catalogs, they make great cross
reference guides.

reason I asked what state is I have an 87 S-10 Blazer Tahoe.  2.8 motor runs
like a champ, body fair, tranny trashed. daughter wrecked it, no frame
damage, replaced all the front sheet metal before realizing I was wrong
about the tranny leak.  what she hit cleared the bumper and frame, shoved
the water pump back through the timing cover, engine still ran.  Replaced
water pump, fan clutch and fan, timing cover and put new gear and chain set
in it as well.
I thought when it got hit the rear crossmeber flange the tranny mount bolts
two got the pan, there no clearance there. I was partially correct, yet
wrong the housing is also cracked  Used radiater and ac parts are in back of
truck.  I am not willing to put a tranny in it, too hard to find a good
700R4 that will bolt to a 2.8 used. and I dont want to spend $1800 to have
this one rebuilt with a "new" case.  Three generations have driven her, she
was a good truck, never left anyone stranded ever.

Whitelightning

Hinge pins and bushings - Motor/Help parts on the rack at most parts
stores.
Window switches at the same place.
If you mean the interior handle spring it is not replaceable as a
separate part since it is riveted between the handle and the bracket.
However the replacement handles are also available on the rack or from
NAPA or RockAuto.com
If your SURE it is the multifunction switch your actually better off
getting a complete steering column from a salvage yard and stripping it
for parts. It is cheaper AND when you take the column apart you will
learn how to do the repair on your vehicle.

The S Series is easy to get parts for.