The PNW Coast Dropper Post Also Has Suspension [Review] - Singletracks Mountain Bike News
Amazon.com : EXA Form 860i 30.9mm Suspension Dropper Post with Adjustable Air Suspension, 125mm Travel Dropper Seatpost with Lever Kit - 30.9mm x 395mm : Sports & Outdoors
DROPPER SEAT POST Remote Suspension Seat post MTB 31.6mm 30.9mm 125mm drop Stem | eBay