If you want to pay someone to build you a rifle, the sky is the limit. Shawn will build you an awesome rifle.
If you are looking to do the work yourself, there are some considerations. It is pretty straightforward to build a 338RUM on the action you reference. Get a Remage barrel from McGowen or a couple other sources, a go gauge, a Wyatts extended box, and put it together.
The Edge is a bit more complicated. I built mine on a Stiller Predator using a McGowen Remage barrel. First, you will need to extend the magazine feed cut in the bottom of the action by .2" or more. A proper gunsmith can do this with a mill. I did it with a Dremel and a lot of TLC and patience, until the Wyatt's box fit perfectly. Then, you need to file the side bolt stop back in order to allow the bolt to come back far enough to pick up the rear of to round.
At the end of the day, I was able to build a very nice 338 Edge from a Stiller Predator which is one of the most accurate rifles I own and took 3rd in a 2000 yard competition, and its first game was an elk at 730 yards. It gives up nothing on my full customs. But you have to trust your patience and ability to be handy with metalwork.