Where to buy forward scope rail --- Savage Hog Hunter to Scout

[Oystershooter]

I like the concept of a scout rifle and found it fascinating to have a forward mounted scope. (Think Steyr Scouts and Savage Scout and their forward picatinny rails)

But it seems red dots are now the technology to replace forward mounted pistol-style scopes on rifles for fast target acquisition.
Just wondering if it was possible without making too much custom machining or modification of parts.

If you havent seen this video, definitely worth checking out. Make's me want to be scout rifle armed action hero. :)
https://www.youtube.com/watch?v=-x7N8hLI2yM