Go to a good, reputable exhaust shop in your area and talk resonators with them. And in the future, don't announce your lack of a cat publicly. It'* illegal, carries a hefty fine, is environmentally foul, and anyone who turns you in gets a $250 'finders fee' from the EPA. Something to think about.
I can't quote you on my Magnaflow resonator, because I paid less than cost on it, and had the install done for free at the West Coast Bonnie Fest Tech Day.
Word of warning:
To quote my exhaust guy, Jerry:
"If a car goes up on my lift and I see no Cat, it doesn't come back down"
You're in a tight spot, my friend. Good luck getting a shop to work on it now. I'd strongly suggest a dual-purpose unit. Catalytic converter (hi-flow unit) with a resonator chamber built in.