This may sound like a strange idea, but it looks like you are using a triple as a compact double, essentially running only the middle and granny chainrings. If so, then using the same kind of FD as you would use on a triple (not sure if that is what is pictured, not a Campagnolo expert) should result in the same kind of shifting quality. In other words, just like shifting from the middle ring to the granny. Not an optimal solution, but wouldn’t this work?
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