Im looking for the metal peice that slots into the plastic part to open the door im missing it on my passenger side

 

72136-SR3-003 Is the part number, but you'll probably hit the lottery before you find one in-stock at any dealership. Sometimes they'll show in-stock online, you place an order then get an email or phone call saying it's on "national backorder" and they have no idea when they can actually give you what you paid for.
Luckily it's showing compatibility between preludes, del sol, RD1 crvs, and integras, so I'd just go to the junkyard and take one off an RD1. Bonus points if you can find a table!