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Replacement for clocked RS Flip-Flop

I am attempting to find a replacement Clocked RS Flip-Flop but have been unsuccessful in locating one on the TI website. Does anyone know if TI even makes one?  It appears that this same chip has been sold under a few different part numbers over the years so I haven't found a cross reference to the numbers I have below.

Philco / Ford PD994559
Raytheon RM945DC
Fairchild F945DMQB

I have about 50 circuit boards I am trying to refurbish so any help would be greatly appericated.