Part for old Lawson window

A quick learner from Jensen Beach, fl says:
Part we need is a plastic guide for upper window panel. Helps move panel up when cranking shut for a right seal. The plastic guide has 42C lL or R printed on it.
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Casey from SWISCO responded:

Welcome! I believe you're searching for our 36-018C. Just check the dimensions to confirm it.

A quick learner from Jensen Beach, fl says:
That appears to be it. Does it come as a set of 2, R and L? Also, it is missing a screw (fastener). How do I go about placing an order?
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Casey from SWISCO responded:

Good morning! Yes, the 36-018C comes with a left and right-hand pair but does not include fasteners. We normally suggest reusing your originals or taking them to a local hardware store to have them matched that way. You can place an order online or over the phone with one of our representatives.

36-018C : Stanley Intermediate Vent Latch Pair
Stanley Intermediate Vent Latch Pair
36-018C
$5.00
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