Plastic engine cover bolts

[watauga9]

Well, I was doing some seafoam work to my 4runner today and now the passenger side bolt to the engine cover is missing. I have no idea how it came loose so easily. I didn't put the cover back on before I drove the truck around so I'm assuming it came out during that time. Does anyone know the part# or where I can get a replacement? I have the nut for it. Thanks!

Driver side

Passenger side (missing)

 

[stevec5000]

It's a standard metric size so you could get one at any hardware store.