One of the side fins of my Converse windsup got damaged recently and I ordered a new pair from the online store of True Ames CA. I'm very pleased with the great service this guys have and I would highly recommend them!
www.trueames.com
Exceptional choice of all kinds of fins and fin bases; super fast shipping-they shipped mine the same day I ordered them and got them 3 days later in a nice pouch with 3 compartments so I can store the center fin inside too! I was getting constant updates of the status of my order and they even followed up to make sure everything is fine. Awesome service and awesome fins aswell!