Problem during valve cover gasket repair (1 Viewer)

[Alexbv]

I'm in the middle of doing the valve cover gasket and when I pulled the cover off the spark plug tube seals practically crumbled. One of them stayed complete in the tube and a couple others fell apart.
I picked up the pieces but one from the #6 is missing and can't find it anywhere.
I thought I felt it with my finger way in the back when looking for it but not 100% sure.
Is very hard to access that part of the engine to take a good look but I used some mirrors and can't seem to find it.
Are there any oil galleys or places where this could have gone in back there?.
I also looked inside the plug tubes just in case but they are clear (plugs are still in).

How bad of an issue would this be if I can't find it.

 

[gnarlytoes]

If it can make its way down to the oil pan, it will just sit on the bottom and not cause any problem.

 

[Tools R Us]

If it can make its way down to the oil pan, it will just sit on the bottom and not cause any problem.

This, if it's not there, it likely didn't come off during the cover removal, so likely washed down to the oil pan.

 

[Alexbv]

This, if it's not there, it likely didn't come off during the cover removal, so likely washed down to the oil pan.

Well, never found it so hopefully it made its way down to the oil pan.
Thank you.