Ok, I just did the math and (assuming 1.5" x 1/8" Aluminum Stock) I only can only confirm that the middle chime length (161.9mm) will give you a true note (D#5). The short and long chimes are going to be a bit "off key" but maybe that's OK (that might just be the original Bally sound!)
If you are looking for true notes:
F#5 / Small Chime: 148.4mm
D#5 / Med. Chime: 161.9mm (as per PBR)
C5 / Large Chime: 176.5mm
Also, if you run into trouble (took off too much material) you can shorten all three bars to the following lengths and essentially get the same music (but maybe more exciting):
G5 / Small Chime: 144.2mm
E5 / Med. Chime: 157.3mm
C#5 / Large Chime: 171.5mm
Keep in mind that once you drill the mounting holes, the pitch will certainly drop (slightly). But if you file or sand the ends of the bar (after the holes are drilled) you can get it "pitch perfect".
Anyway, sounds like you have a solution in hand. Good luck with your project!