I think the easiest solution of all would be to manufacture BARRELS. Many/most of the Ross sporters I see are wearng next to useless barrels these days. ALOT of actions could be made viable again if barrels were around.
Also, you could offer other calibers if new barrels were made again. A Ross in .30-30 or 7x57 would be really cool. Even a 7.62x54R might be an interesting bit of kit
Another option is to rebore a Ross to something larger caliber with a similar or bigger case base so that rechambering is possible. 9.3x54R is a strong posibility in my view.