I think Scarebird is the easiest way to do it especially if you buy the rotors already drilled, then buy the 1990 Chevy Celebrity calipers on Rock Auto.
I do not know if the rotors will come with bearings, seals, dust caps, etc. Or, if my current bearings will work, I am guessing not. Has anyone done it this way with an early A body car? Link follows:
http://www.ebay.com/itm/390323330680?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649