Premium Aquatics still has the same MH
bulb for the same price. Im sure you can get the ballast for a similar price as well, but I wouldnt recommend Graybar Electric unless your an electrician. Graybar is not a retailer, meaning they dont sell to the public. Grainger has the ballast recommended in the article, but its $95 now, through them. I dont recall ever seeing sheet aluminum at my local Home Depot, but maybe you can get that somewhere else. Seems to me the ballast is going to be your biggest expense. Thats the only thing you might be able to get cheaper some place else. Who knows. Noone ever said the hobby was cheap, right?