Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
I think Wemoto do kit style cables
... just remember to have a bigger hole on the opposite side to cable and "birdsnest" the inner to fill the hole before filling with solder to stop it pulling through.
Un soldered brake cable ends were an mot failure when i did my course
... I do know you can build your own Bowden cables with parts from these guys https://www.bowdenzug24.com/en/