set of bumpers fit 1986-1987 and might fit the 88-89s too. These were take-offs way back when and show almost no wear. $120 Paypal and buyer pays shipping.
Rear bumper PN is 82510-HA7-650 or 82510-HA7-670
Front bumper PN is 62510-HA7-670

I also have two more rear bumpers in similar shape

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