You might want to contact Winchester and ask how many you would have to buy to get them to make that model again. You could finance the rebirth, market the guns you would have the corner of the market on, and test your theory. If the price is rignt then put me on the list for a 7MM-08!
I don't know if the market is there or not. I Bet Winchester's research says it isn't or the guns would be available now. The major gun makers are not dumb, and would be in the marketplace if there was a reason to believe they would sell. They are in business to make a buck, not to disappoint potential customers.