The first item is called an "Airhead Rope Tow Harness"
This is what you are going to use if you do not have a Ski Pylon or Center ski eye. This Tow Harness attaches to either side of your transom with 2 carabiner clips. Your motor is going to be in between the tow harness. The tow harness has a float on the end that hooks to your ski rope so it will not get caught in your motor.
One of the reviews from the Basspro.com website states this,
"This was the best buy for me as I took my time looking for a durable tow rope that would last a long time. Not cheaply made and you will be well pleased."
The next item is also by Airhead. It is called the "Tow Demon Ski Tow Harness."
This models uses a vinyl coated metal cable instead of a nylon rope. It also has a pulley system inside the red float that makes it easier to pivot from side to side when the skier/tuber moves to the side of the boat. They make this tow harness in an 8 and 12 foot version depending on your needs.
And finally, if you have a bass boat with a pedestal seat in the back, the third items is best for you.
The Swivl-eze Ski Tow Bar fits in your 3/4" pedestal base in the back. The Tow Bar will get you rope out of the water and create less drag than the other tow harness. The entire Tow Bar is removable when you are wanting to fish and not ski.