Both of these filters will work in a 75A-4. The filter to the immediate right is a 455-H-05. The difference between the 455-J-05 and the 455-H-05 is the H package was designed to solder into the application. The "J" package is the standard for the 75A-4. I removed the "H" from a circuit board, cleaned the terminals and plugged it in to the 75A-4. Worked fine!

The bottom right picture is of a home-brew ceramic filter designed for the 75A-4. It is for AM (amplitude modulation) and has a bandpass of 13KHZ. The AM audio has a very nice sound with the filter.