looking for hp rack panel

I have an older (dark grey) HP rack that has a front door on it. The top 2/3rds of the door is closed off metal (dark cream color). The bottom 1/3rd is a dark brown/grey plastic vent. In the area that is vented, I'm missing one of the vent/slotted panels to fully close it off. I used to have a 7900A drive sticking through this opening, but no more (not in the current configuration being built). I'm building a machine to (hopefully) take to a VCF show, and would like to obtain another one of those vent panels to properly fill up the opening. Ideally, I'd like to buy/trade for one of those panels and keep it. But if you have one that you don't want to let go of, I'd at least like to borrow it for a few months for the show and then could return it. Does anyone have one of these plastic vent panels? Best, J