Simple Question - 2009 6 MT Bell Housing Dust Boot

Hello. Super simple question - my 2009 6 speed has a rectangular hole on the bell housing. This is hidden by a heat shield, but one removed, it is wide open. I have searched high and low and have been to a toyota dealership to no avail seeking a dust boot to cover the hole to no avail. I simply cannot fathom the hole would be left uncovered by Toyota, seems unfathomable. Can anyone confirm and if there is a dust boot, can anyone provide the part number?

I have included a couple of images I saw on this forum to clearly show the rectangular hole.

 

No boot. Just an inspection hole thats covered by that metal shield

 

Appreciate it. Seems unbelievable. Thank you.

 

Im not familiar with that but it does seem that shurely that would be covered. 4x4 mud etc...

 

Yes sir. I have driven through deep mud/streams/small rivers, very deep, lots of debris, zero chance that area was not flooded. Cannot imagine anything in there appreciates the moisture, grit or debris.

 

So now I'm curious. Is that normaĺy open? Thats really bad for crap intrution. I cant see any reason it couldn't be closed off? I mean it doesnt need a gapping hole.