I have been using my double critter nation cage without many issues for my canaries and budgies so far. I have, however, had a tremendously hard time finding feeding cups that work on closely spaced horizontal bars... The bars are 1/2" apart and I have tried several styles and most have utterly failed or are so hard to remove, that I end up spilling water or seed everywhere when changing them out.
So far, the only style that has worked are plastic "D" shaped cups with long thin metal wires on the back to "hang" the cup off of the horizontal bars. I'd say the metal wires are about 3/4" long. My problem is that I purchased two of these cups while at the bird show and have not been able to find them anywhere online or in stores.
If you know of any online source that sells cups with long metal hanging wires at the back I would greatly appreciate your help. The next show isn't until November and that is a long time for me to be flinging seed / water while changing it out every day.

Thank you for your time / help!