Jet boating SI

OK, Unashamed bludge.
I have my 17 yr old nephew here from early December, and would love to tee up a jet boat ride, but preferably not a commercial one, as I reckon a true blue kiwi hunter type will do a better job of scaring the crap out of him ;)

Is there any one out there who may be willing and able to accommodate such a deal ?
All fuel costs etc would of course be covered. Location should not be an issue.

Could possibly help, brother and father both have jetboats does he like salmon fishing??
Would be up the Rakaia

He likes fishing, but I don't suppose he has ever tried for Salmon before

If you make it down as far as chch il take you up the mak
Any excuse to get some dents

The lad leaves from chch mid jan so there is a strong chance . Thanks