Excuse me for not understanding completely where the circlip goes ...?
But if it is inside the engine or on anything safety related - PLEASE get the right one and do NOT modify it !!!!
I have seen engines smashed because of a circlip that was only 0.1mm too big in diameter and in that case I even recommended not to use it but to wait for the right one, but the owner was in a hurry so I put it in and the engine lasted TWO miles -> he blamed me ever after for the destruction of his engine
Per