It's all about the same price.Some things you can't be cheap on and in my opinion porting is one of them.Save the money and get it done by a reputable porter.Flotek,Ken O'connor,wildcard are a few good choices.
you gotta call the builders and see what you want to have done, and they'll give you a price, some of their prices may have gone up since we had ours done, and some may have found new cheaper parts suppliers and pass that on to us ????