My 2 Cents,
I have found Strapper Surf in Torquay, Ocean Grove and Geelong to be excellent to deal with! www.strappersurf.com. They also support Sup in all aspects!
Imperials Surfboards Ocean Grove quality is superb and as a shaper of custom boards Dave Boyd is excellent!
Sam at Wind Surf and Snow was great to deal with and extremely helpful and accommodating.
Blane Chambers, Andrew Allen and the whole PSH crew's customer service and industry support is No.1
Rod Hocker Surf Shapes, excellent product and quality workmanship cant go wrong!
The SUP Bus supb.com.au, extremely professional Paddle School!
I can only say beware some of the companies that are popping up to leach off the SUP band wagon! If it looks to good to be true, usually it is! Phill

