Wouldn't be worth the time and effort for anyone to make them due to the fact that our heads flow so well from the factory...but rather if your looking for heads just get a new set of 04 heads and have them ported and polished or just use the ones you now.
This is an interesting question. If you're looking for a set of heads to go with the mods listed in your signature I'd agree that you're not going to do any better than the stock heads as they do flow very well. I saw a thread some time ago where the merits of aftermarket heads were discussed. Can't remember the details. If you are considering more mods, it wouldn't be a bad idea to PM Postban and get his opinion on this one. Or talk to a good engine builder. With the right setup a set of aftermarket heads are probably beneficial, but I have a feeling that for the majority it's not worth the money.