Where would I go to find a riverboard, it seems like they are hard to find in stores especially around Texas even though Texas has the hill country with the guadalup I think riverboarding would be hugely popular there. I don’t think very many people know about it.
https://www.nrs.com/product/86150.01/carlson-river-board
http://www.kernriverboards.com/product-category/riverboards/
Plus shipping.
This link has lots of info on the sport.
http://www.eriverboarding.com/gear/boards.html