In order to upgrade your direct drive setup to a Bowden one, you need the following items.
1) E3D V6 type hotend (Here it is on Amazon) $15.69
2) New Modular X-Carriage (Get it HERE on Thingverse) $FREE.99 + cost of filament
3) BIQU 3D Printer Injection Edition Extruder Here it is
on Amazon) $11.98
4) Extra PTFE Teflon Tubes (Here it is on Amazon) $7.98
5) Bowden Extruder Mount (Find it HERE on Thingverse) $FREE.99 + cost of filament