can you please help me determine which is the correct channel balance replacement for this?
Thanks!

Thank you for posting! This balance appears similar to our Series 385 channel balance, but I'm not entirely sure. Check out our 15-004 and see if its dimensions match that of your own shoe.
No. Our Series are determined by the nylon attachments on either end of the balance. I have already identified the top attachment as our 19-005, but I just need to know what the bottom shoe is. It appears similar to our 15-004, but I cannot be sure without you confirming dimensions, which is why I posted the picture above. Is that what your shoe is? You should also look at our 15-005, whose dimensions I will post here:
The dimensions are the same as the 15-005, I am not sure which balance part number that is.
Thanks!
If 15-005 is the balance shoe you have, then you may want to consider our Series 380 balance.