Tom from SWISCO responded:
November 5, 2013
For the locking handles, check out our 38-274 and 38-275 and see how well these compare to your existing locks. I am not as sure about the operators, though. I would have to see yours fully removed in order to get an idea o what you need. Check out our selection of Pella casement window cranks and see if anything here is a good match.