Jakob,
On the Gold Coast you can contact Kirk whose business "Gold Coast Windsurf" rents and delivers current model JP and Pryde gear on 0402484502.
We do short and long term rentals, pick up from Brisbane or delivery to Sunny or Gold Coast 7 days a week. From wave, freeride, slalom, super wide beginners boards to formula gear. Just added a brand new One Design Hybrid in our range last week. SUPs with windsurf rigs also available shortly. Rates at site or contact for details.