www.Ebay.com has lots and lots of ice fishing items. Enter "ice fishing" in the Ebay search and you get 50,244-results.
Eskimo 8" diameter, hand powered ice auger, $52.85, shipping included
Eskimo 6" diameter, hand powered ice auger, $54.99, shipping included
I would go with the six inch which is plenty wide, enough, and weighs a little less to carry. There's a four inch diameter that also works just fine, too, and makes it lighter to carry and easier to keep sharp with a small sharpening file on the two replaceable, tungsten cutter blades.
Drilling through 8" thickness of ice with a hand powered ice auger takes about 30-seconds with a sharp auger. Using the hand powered auger shows the user how the ice is variable like when you hit a soft spot or a hard spot because ice formation can be tricky-wicky. You never know what you are standing on and drilling it by hand gives you a better hands-on feel for it than using a power auger.
Is like the difference between a chain saw and a hand saw. A sharp hand auger drills it fast and works totally super-duper.
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Like, one of the forum members here, had a Kawasaki Mule atv equipped with a propane powered ice auger attached to the rear of the Mule on a swing arm, and unfortunately sunk the Mule through the too thin ice, close to Welch Island ....... boo-hoo-hoo!
What happened is that big propane ice auger on a swing arm cuts the holes so fast that he lost track on cutting and actually cut a round line of holes, all around the vehicle, just like that wily e coyote cartoon, and it sunk!