There seem to be two big manufacturers of Ford stroker kits - Eagle and Coast High Performance.
www.eaglerods.com
www.coasthigh.com
I wasn't aware that Rousch was selling just the roatating assembly. I wonder if it's really an Eagle kit? Anyway, I would look at both those companies.
For a street stormer, I wouldn't spend the money on forged parts. Cast crasnk, stock rods, and Hypereutectic pistons can take a lot of street abuse, and even some track abuse. Can't withstand a blower for long, though.
Another resource is
www.fordstrokers.com . They sell Coast High kits. But from their web site you can get a good idea of price.
Also, talk with your local machine shop before buying any parts. Sometimes they can get good deals from wholesalers. And you want a machine shop comfortable with the work.