While we do not endorse any particular equipment here are some options to consider. A quick search of Amazon for Dragon Boat will yield quit a few equipment options as well as accessories.
Paddles
There are many good paddles out there. Here are some to choose from on Amazon. Hornet Sports is one of the leaders out there but, by far, not the only ones.
Dragon Boat Paddles from Amazon
Seat Cushions
 | Dragon Boat Seat Cushion, Anti- EVA Fishing Seat Pad for Watersports Rowing |
 | Hornet Watersports Dragon Boat Seat Pad Neoprene Anti Slip Cushion |
Dragon Saddle is another good source seat cushions
Gloves
Paddling Gloves from Amazon
REI in Knoxville is a source for Paddling Gloves
River Sports Outfitters in Knoxville also carries Paddling Gloves