You could just have the heel pad replaced.
How does the gun fit you? If you want to add a bit of length, you could either whack on a kick eez pad with some spacers, which is black and less offensive than that orange thing.
Other nice option is a solid vulcanite extension. So you’ll just have an inch or so on the back of the stock that is shiny polished black and blends seamlessly with the stock shape.
These look pretty sweet when done properly.
If you need to change the cast or bend you’re looking at quite a bit of work.
If it was my gun, I’d re-black the barrels and furniture (top lever, trigger bow and pins) as
@ugly suggests, polish up the wood (if a nicer stock is unavailable) and stick a vulcanite extension on it.