Does anyone know if any of these type of manufacturers are making wheels with our specs yet.

no one is really making rims for the hhr. but you need a 17 or 18 or 20 x 7 1/2 with a 40mm offset that has the 5x110 bolt pattern. But i am doing a 20x 81/2 with a 42mm off set and i tested fitted them and they will work for me.