Alright.
-The ones circled in
blue can be found under the ice castle tiles.
-The ones circled in
red can be found under those white tiles around the lava ones.
-This tile that is pointed by the
green arrow is used for corners of the bar top, but there is no actual official tile for it unfortunately
If you still can't find them, I'll post the level for you to download so you can get them.