I have 2 new TerraTrike seat bags which fit all current TerraTrike seats. Here is a description of the bags from the TerraTrike website: http://shop.terratrike.com/Seat-Bag-p/tt600134.htm
Also not mentioned in that description, the bags have metal grommets on each side to allow mounting flag poles to the seat.
These bags have silver reflective strips on the back and yellow TerraTrike logos on the front. These bags are normally $29.95 each plus shipping. I'm selling these never used bags for $23 each plus shipping.
To arrange purchase, e-mail me at firstname.lastname@example.org with your zipcode.