Do you means Harry Ramsden? My husband and I are also fans of it.
I'm afraid it's difficult to find another one which is comparable to it. Once there was also a Fish'n chips restauant in Lockhart/Lugard Rd, but it was also closed down. Perhaps u need to go to UK in order to taste the yummy fish'n chips again. I did go to the Harry Ramden's when I went to UK last year.