I've seen it suggested in various online venues that Edward Cabrera of the Marlins may be available in trade. I think he's a more realistic get than Peralta given how mediocre the Marlins have been this season. I had a look at his pitch mix in Statcast and he features an interesting blend. Oddly enough his upper 90's 4 seamer and sinker are by far his worse pitches as they are each hit very hard. Based on the heat maps it appears as this is largely due to poor command with too many center cut fastballs.
Cabrera features two elite secondary pitches in his slider and curveball which have garnered 45% and 40% whiff rates respectively. One thing that stood out was that Statcast has him throwing a 94 MPH changeup which has been far more effective than either of his fastballs, so he could be better off largely shelving the fastballs in favor of a slider/curveball/changeup mix.