Chris -

Cheap Bundts may be available from wreckers - $50 each? Then have them blasted with walnut shells or whatever and repaint/clearcoat yourself. My wife's SLC has 15" Bundts which are OEM so they are out there, but I am unsure of their offset so a little research may pay.

I actually find the Bundts (guess who gets to wash the cars in our household.....) easier to clean than the 15 hole ones as there are no relatively inaccessible orifices.