Having always just used soft tortillas with mole, I wasn't sure what corundas were -- but they're a type of regional tamale. If you're looking for recipes, I found several doing a Google search. But if you're looking for supplies -- any large ethnic grocery store should have corn husks (one of the options for wrapping corundas), and all the Hispanic grocers where I live stock frozen banana leaves.
If you're going to use banana leaves, the frozen ones are easier to work with -- you don't have to scald them or do any other prep work -- just thaw and wrap.
Good luck with the mole. What kind of mole are you making? Poblano? Coloradito? Amarillo? Rojo? There are so many.