Arkel Randonneur Rack - Seat Post Rack - Carbon Seat Post Friendly
Portland Design Works Bindle Rack Seatpost Rack | REI Co-op
Lumintrail Bike Cargo Rack, Seatpost Mounted Bicycle Luggage Carrier with Side Tire Guards, for Trunk Bags and Pannier Bags, 20 LBs Weight Capacity - Walmart.com
Bicycle Bike Alloy Seatpost Mount Rear Back Cargo Pannier Rack | eBay