Looking for lock part for sliding door

Thanks for writing in. Pella discontinued this door some time ago, so I'm not entirely certain we can help. However, take a look at our 82-252 and 82-253. One of these may work; I just can't say for sure without knowing if the style matches up with the missing lever. I stress this just a very educated guess, so I can't make any guarantees; but it's the closest match we have. Let me know how you make out.