TripleX Seats makes a rear bench seat for x4 models: triplexseats.com/honda.html
This is a better alternative to using a bump seat due to strict height/weight limitation on them.
10-80 Dirt Sports makes seat riser brackets to raise the front seats 1.5 inches: www.10-80dirtsports.com/product-page/honda-talon-driver-seat-risers Passenger side: www.10-80dirtsports.com/product-page/honda-talon-passenger-seat-risers