Could this be made in an 8x8 metal pan instead? I am sadly bundtless.

The only problem will be that I'm assuming your pan is fairly shallow, so there will be more dough than will fit in a pan with high sides. I haven't made this recipe, but I have made monkey bread in my 3.5 qt Le Creuset. It worked beautifully.

I've never made this recipe but if it was me, I'd try it and just watch them because the cooking time may need to be adjusted.