The same problem
I have a FR 360PDEK with the same recessed light fixtures and the same broken tab issues. I have emailed World Friendship Co with the model and part number, and I wait there response.
In the mean time, I went to Home Depot and picked up some clay/gum/silly puddy type stuff, which I forget what it is called. It is easy to work with, and can be rolled and molded into a nice little "wad" which sticks the lens up and holds it tight. It has not fallen off, even with some hefty bumps.
It's cheap, and it works...probably get it at wallmart as well, next time you are moving.
Hope it helps!