Hi Ben, try these places:-
Beach hire in front of Noosa Surf Club.
Noosa Stand Up Paddle, white and green van at Lions Park behind the Sheraton.
StandUpPaddleSurf, along the river at Noosaville.
Adventure Sports along the river at Noosaville.
Not sure about the beach hire place but the others have a variety of boards.
Shoukld have been here last week.
ET.