Shimano left shifters don't work with front derailleurs of the opposite type (ie road shifters don't work with mountain front derailleurs). You could do what I do and go friction and not worry about compatibility as it's all good when you go friction.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"