Help needed locating Wetbike parts and more

Hey guys i recently picked up an '86 wetbike i found in a backyard shed. Well i just finished up going thru everything and replacing the hull/pump gaskets, new lithium battery, new aluminum fuel cell, plugs, wires, all new wiring and it runs great. Im trying to find a better exhaust for it. a scoop for the pump intake and a speed plug for the nozzle. Does anyone know where I can find the parts i am looking for? Also i am new to the wetbike so if theres anything I should be aware of or you think i might benefit from knowing please feel free to let me know.
Thanks
 
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