I don't have the PROM data, but the below info from the Bally Theory of Operation manual looks useful. It might not be too hard to reconstruct the PROM data.

Have you got the wiring harness to the sound board sorted out?

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OPERATING MODE A

Operating mode A is selected when all four "A" jumpers on the sound module PC board are installed and the "B" jumpers are removed. Sound module tone memory U3, Bally P/N E-725-22 must be used.

Operating in mode A is similar to mode B, except for the following differences.

Solenoid bank select and address E inputs from the MPU are not used. Tone memory U3 address input E is grounded and thus permanently low. The tone memory differs from that used in mode B (U3 P/N E-729-18) in that it has all null divisors (N = 1), except at address locations 1, 2, 3 and 4. The divisors at these four addresses are such that chime frequencies corresponding to the four mechanical chimes are produced. The tone trigger generator is started each time solenoid address D makes a high to low transition. This occurs whenever one of the first 8 momentary solenoids is addressed by the MPU. However, since tone memory contains null divisors in all location except the four occupied by the chimes, sound is heard only when the MPU addresses a chime solenoid.

If you need help reconstructing the E725-22 PROM, let me know.