Slider with older T-Lock

29B BSI TO is stamped on my channel balance.
The T-Locks are breaking. I need either new T-locks or new balances.
T-locks look like an older style.
The balance has a hook to connect to the window frame.
Can you tell me what would be the right part?

Yes it looks like that hook will work. All my balances eventually will need replaced. A few more fail every year. I currently need 10 but may order more or less depending on the cost.