Also, if I have to replace them to work with the sashes I'm buying, how do I get them out if there is no notch? Thank you in advance for you help.

It is hard to tell which pivot shoe you have without dimensions, but from looking at the photo I believe you have the 15-046.
Your pivot shoe does look fine. I know from the repair work I have done in the past that it is not unusual to only replace just the bad balance and reuse the old pivot shoes (as long as they were in good shape). Also before replacing your balances, check to see if your balances just need to be charged up with the 75-006 charging tool.