Gen 2 Prius headlamp dust cover replacement?

My used 2008 just lost a headlight bulb and when I replaced it I saw I was missing the dust cover. I'd like to take care of that before I put in Hikari LED replacement bulbs.

There are many generic H4 headlamp back covers available online, but it's hard to confirm actual fitment. I cannot even find the OEM p/n for this rubber cover. I think 80mm covers like these are appropriate?

If anyone has a link to something that definitely fits properly, I would appreciate it!