Tom from SWISCO responded:
August 11, 2015
Thanks for contacting us. Unfortunately, this operator is no longer made and I'm not sure there is any ideal substitute for it. You may be able to adapt our 39-094 and 39-095 Andersen operator and track kits, but they won't be an exact fit and would likely require you to retrofit the sill to accommodate them. Even then, I cannot guarantee that they will work. Please carefully go over this hardware and let me know what you think.
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