S385-13 Channel Balance, but 13-5/8" long

That might make a difference, actually. Are you sure you have the Series 385 balance? There is a specific kind of custom balance that is designed in lengths that end on a 5/8". The tell tale clue is that the bottom shoe has the pulley wheel built right into it. If that's what you have, we'll need pictures of your balance. Specifically, we'll need to see the top and bottom ends, the stamp, and the metal clip at the end of the cord. Finally, how many did you need?

Great, thank you. This is just what I thought it might be. Your pictures are a big help. I will email you a custom order link and price quote immediately.