Try the yellow pages and find a mom and pop type shop midas and the other big ones will usually charge you an arm and a leg just to put ur car on a rack.
And take your car in and show them have them put it on a lift and look at it to give you a price.
Honestly though headers are the way to go kill a few birds with one stone
Or at least plog and dp that would only be like 200 and if your a little handy with a wrench not to bad to install..