Don't need another 300 Weatherby. Always wanted a 300 H-H.
How original is the rest of the rifle. I ask because if the stock is after market and/or the receiver was drilled for side mounts or was polished and reblued you might as well put a new after market barrel on it.
Other wise if the rifle is in original condition I would post a wanted add and continue to regularly scour the for sale adds. You could also have the original barrel contour copied on a new barrel so you don't have to modify the stock and go that route. you could then have your 300 H&H to shoot while still looking for a original barrel.