im not aware they made a climate control delete plate, never heard of it. AFAIK, every 3rd gen had at least heat, so there are heater controls, and delete plates for the dash vents, but not the control, nor the hole in the firewall.
seen speaker delete plates for the dash too
the door lock and radio delete are currently on ebay
radio
http://cgi.ebay.com/ebaymotors/82-92...Q5fAccessories
door lock i believe
http://cgi.ebay.com/ebaymotors/82-92...Q5fAccessories
even found a v6 smog delete pulley that i didnt know existed either, unless somebody made it.
http://cgi.ebay.com/ebaymotors/82-89...Q5fAccessories
here's a firebird dash vent delete plate
http://cgi.ebay.com/ebaymotors/82-92...Q5fAccessories