I'm in the same situation looking for front and rear bumper. Everybody told me to find used bumpers as aftermarket never fit 100%. Maybe you can find some in a junkyard. Classic Industries has front bumper for $300. They had a 20% coupon code for September. They should have discounts throughout the year and around Christmas. When I signed up for an account on their site, a message poped up about the discount. I already new about it just from google but nice to see it from them. Not sure how much shipping is.
http://www.classicindustries.com/con...rchCatalogId=1
Any bumper from a 3rdgen will fit your car. However any bumper not 91-92 with aero ground effects will need to have new mounting holes drilled to match up to with your aero ground effects. Rear bumpers are interchangable too. However through the years they changed slightly to be a little more taller and have different surface contours.
Let us know how you make out.