With lids? I've never seen them. Where have you seen them?
My local Maayan has them about 1/3rd of the time.
I don't recall seeing them anywhere consistently, but I don't frequent the dedicated Chad Paami stores...
If I needed anything Chad Paami in an emergency and was not sure I would find it, I would go to the store in Geulah on one of the alleys (the one that goes down the stairs to go in - should be the second alley on the right, I think, coming down Malchei Yisrael from Kikar Shabbos). You should check there if you are desperate. You can probably even buy the covers there seperately.