Since I left this thread "unfinished", I thought I'd pass along to you all what I found out about the headliner issue.
First of all, thanks to DeathRat for taking the time to check out part numbers for me! For those of you who may happen to need a beige headliner for a 92 with a sunroof, the part number is 25616098. What you'll find, however, is that it'* a discontinued part and most GM dealers can't or won't help you try to locate one.
The good news it that the folks at Bob Stall Automotive Group http://www.auto-parts-for-less.com/
hooked me up with a place called Vintage Parts, Inc http://www.vintageparts.org/index.html
. They are located in Wisconsin and they only sell discontinued stock from GM (and other companies as well). Turns out they had 22 of these headliners in stock at a price of $208.46 each. That'* about $100 less than GM'* list price!
The downside to Vintage Parts is that they cannot verify part applications, so before you contact them or do an online parts search on their site, you need to know the part number you are looking for. They also do not sell to the general public - from what I can tell, you have to either be a dealer or referred by one. Simply identifying yourself as "Referred by (insert dealer name here)" will do the trick.
At any rate, I thought I'd pass that on to the group, since as our cars get older and more and more parts become discontinued by GM, Vintage Parts, Inc could be a real good source for stuff. My headliner is enroute and should be delivered on Monday, and overall the experience with Vintage Parts was a good one... if anyone has any questions, just yell.