Both of the patch panel mounts in the links are wall mounted swing mounts. As shown, they both hinge to the left. Flip them over to hinge to the right. They both allow the panels to be removed.
The OP wanted the hole in the wall to be covered, which both of the panel swing mounts will do, just one of them will still need a hole somewhere for the cables to come out of the wall and into the punchdowns. He envisions the patch panels to be almost flush with the wall, possibly even recesssed into the hole.
Since he would then be covering this up with some kind of rack framework for his switches, etc, he could use that for terminating his patch panels as well.
Just find a 12u wall mount rack/cabinet that has both front and rear equipment attachment rails, ie: patch panels on the back rails-switches, etc on the front. Should even be able to find one that swings open for access. Just that the wall mount swing rack prices may send him into sticker shock........
»
www.cableorganizer.com/c ··· ets.htm#