You usually don't need to customize a Marlin to shoot ,, the 10/22's are different and just took off on the market.. To me says that the only thing good about them is reciever as all other parts are thrown away and replaced.
I am sure some of the custom barrel makers would make one if you contacted them..
Custom 10/22's cost to much for me.. My marlin, cz and remington 581 cost a third of a custom 10/22.. I prefer function and never did go with the crowd on guns. ( Unless its Marlin Levers.. but they don't have to be customized to shoot well. ) :lol: