Hey Mike,
I am about your size and I have some 10 and 15 year old skis that are the biggest they made at their time. If your parents place is near Melbourne, let me know and I will let you try them.
Also how is the boat propped? A lot of bigger sterndrives are propped for top speed and they take a while to get up on plane without a skier. If you can change the prop to a lower pitch and add a blade it will help you alot. (Of course if the boat is a Bravo 2or3 with 2 props that would cost a lot). You just won't have as high of a top speed, and you may have to limit your throttle at speed to keep from overreving the motor.
One of my wakeboarding friends has a 20 foot sterndrive that came with a 23" pitch prop and it was terrible getting out of the hole, and getting on plane. We changed the pitch down to 19" or so. And it is so much easier with the lower pitch prop. I can easily get up on my fiance's tiny 66" slalom ski from a combo.
New skis are always cool too, and the new types of bindings are great too. I had old rubber bindings on some of my skis, and I was always exhausted after getting my feet in the bindings before trying to start. Adding dish soap or Astroglide helped a little bit. But the new bindings by almost all the brands are so much better than the old style too.
Cheers,
Rip