all 9000 dash tops are pretty much the same so if you have access to a wrecking yard you should be able to find a replacement. Cracking is not common. The early cars had the sun sensor to the right whereas later cars had one in the center of the dash top. Maybe the speaker grilles were different, but at most there were two dash top designs.
Try ebay. seen a couple on ther going for penuts (in the uk though). Again on ebay if somone is breaking a 9000 see if they will accept an offer. Ther pretty much all the same appart from cars fitted with acc had a hole for the sunlight sensor.