Where to find diagrams and parts numbers?

Hi
I have the 1987 GM Body Service Manual, but the info I'm looking for is not posted in it (or at least I haven't been able to locate it). Been searching through the internet and have found some diagrams and in some cases parts numbers. But still missing a lot.
Is there a location where I can download (maybe buy) all drawings/diagrams with parts numbers for a 1987 Buick Estate Wagon LeSabre/Electra, Body Type B Series 4BR/4BV and Style 35?
I am right now looking for all the sheet metal/body parts like doors, rear quarters, fenders and so on.
So far I have found:

Buick LeSabre/Electra Estate Wagon 1985-1989
GM 25501908 Fender right front
GM 25501909 Fender left front

GM 20258044 Rear right outer panel
GM 20258045 Rear left outer panel



Thanks in advance

 

Here are some more drawings.

 

All dealers used to have what was called "microfiches" (pronounced, "microfish") at least up to the early eighties. They're stored somewhere and someone has to have them. Technical illustrations with coordinating part numbers are listed

 

That's the thing; "somewhere and someone". So anybody has an idea or know?

 

First, you need a Fisher body manual for 1987. Now, whether it was in print, on microfiche or on a CD-ROM, depends on what you find. But, try googling "obsolete Buick body parts" (yes, in quotation marks) and see what pops up

 

The Fisher Body Manual was included in the Bishko Automobile Litteratur disc. A parts catalog was not included. Have that for my other two classical cars including interchange parts book. But this -87 Estate is too new...

I googled "obsolete Buick body parts". Found a few sites that I hadn't seen before. Some actually interesting.

 

Good, let's hope that works in your favor.

 

There's also a GM parts book. They usually came in two books. One has exploded diagrams of the systems and other has part numbers that you look up. They were for a wide range of years (my set has '65-75 Pontiacs) and were available still somewhat recently (my copy was printed in 1987). They don't come up very often though, since generally only dealerships used them. So they're harder to come by than the standard shop manuals and tend to cost a bit more. Some of them have been reproduced on CD format but not many.

Something like this: eBay Link

 

Well, when I buy an old car i immediately buy the Shop Manual and if I can find a Master Parts Book (CD accepted). Also buying the Interchange Parts Book if available. So I have a nice library by now. However finding information about this "young" car seems a bit difficult.
I keep searching and if I find something I will off course share. Reckon I will not be the only one having difficulties finding info and parts for a 80's "clunker". Should have bought an older...