Custom cables can be ordered through an authorized dealer...
guess who
... the thing for the Savage or S40 is that there are 3 types of throttle end mounts, and of course a different one for each type of carb used on the engine. Also, when making custom cables it is necessary to measure each cable or brake line to within 1/2" along the route the new cables will travel.
I use a small electrical wire or something similar to lay on the bike where I want the new cable, mark each end and then lay the wire out on a flat surface and measure with a tape measure.
Time from order/payment to delivery can be from 2-3 weeks.
If you wish an exact cost estimate I need the measurements for each cable/line, and also whether you want black vinyl, or one of the stainless steel braid types (standard bright, platinum, or carbon color).
All of the stainless braids are the same price for all color versions.