Since you are just experimenting with animation, why not just use
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? If you are looking for more interesting models, if you go digging through sketchfab, you can find some interesting things (just set the options to show objects you can download, you will need to register to download). Several years ago, some of the folks at deviantart also had nice things to download, I haven't looked recently. The latter were mostly for sfm, but if Maya can't deal with them directly, you can convert them.