For my 1987 I've used RockAuto replacement taillights. At the moment it looks like they only have a Left unit for your vehicle. It's likely other suppliers will have these cheap knockoffs as well, the ones I bought worked fine but obviously were not up to OEM quality standards. Another option: I'm restoring my 87' and was able to get new OEM lens and gaskets from dealer. The plan is to re-lens my stock units. We'll see.
Good luck with it, S.
