Please welcome Eyoyo Underwater Fishing Cameras.https://amzn.to/3siEgXn
The ice saw manufactured by Fish's Sporting Toys is the way to go. Many places online, and in stores, sell them. I bought mine right from the company's website, and also had a nice phone conversation with the owner. He's a good guy, who is located in NW MN.
The Fish toy saws are the only saw I will use. have had two of them now(should of never sold the first one) and won't go with anything else. they cut like you are cutting through hot butter.
i do not know what brand they were but they had some at northwoods today in pinconning