I need to order the middle vent on 90 metro

I have a 90 metro and i need the middle air diffuser or air vent what ever its technical term is and i cant seem to find it anywhere. it has two seperate air diffusers and comes as a solid piece but because I dont know what the official name is Im having trouble finding it. Any help would be apprectiated

Your best bet is a junk yard. I am unsure about your year, but on my 93 if you replace the whole vent unit you have to pull the dash. What I did was went the the junk yard pulled the pieces from a junker. If you are carefull, you can slightly bend the pieces and they will come out without breaking them. Take note of how they go together before you pull them. Took me about an hour to reasemble my double vent with just the pieces from the junk yard and NOT pulling the dash.