I know what you are talking about (the red double row boxes) and they seem to have gone away. The flips with the smaller windows are available (2.5" x 2.5" with 1.75" opening) but not the larger size and not the storage boxes for them.

Best I could find was the black ones at JPs corner for the double, or red single row. The double row variety is a little taller than needed which may be good or bad depending on your PPOV.

http://www.jpscorner.com/coin-holder-storage-boxes.html
(last item on the page)