Float question

I have a Carter AVS 4966 and one of the floats has a hole in it somewhere. I tried to order one locally but the one I keep getting as the replacement is not the same as the original. The pic below is of the 2 different floats, one on the bottom is the one they keep sending me. My question to ya'll is, can I change both floats to the one they can get me? It does fit but will require minor tweaks to get it to work or do I need the original style?