Summary

Super cheap, $0 if you have screws laying around, direct extruder for the Anycubic Mega X

You'll need:
-Some extra Bowden tube
-2 M4x12mm machine screws and nuts
-2 M2x5mm wood screws
-Extruder extension cable OR extra extruder cable

Tools:
-Hex keys
-Needle nose pliers
-Small drill bit or needle and lighter
-Razor
-Screwdriver if your screws aren't hex

Installation:
-Remove bowden tube and top two wheels from hot end
-Insert wheels through new bracket and reinstall wheels
-Squeeze bracket flush with original bracket, and drill or melt pilot holes in the smaller holes above the wheel's holes
-Install M2x5mm screws in the pilot holes
-Remove extruder assembly from stock mounting point
-Install extruder assembly on bracket but don't tighten nuts
-Cut Bowden tube to fit between hotend and extruder (NOTE: Better to cut long and trim down than cut to short and throw it away)
-Install extension cable or solder two extruder cables together
-Secure wiring

Filament feeding:
-If you relocate the spool holder, no issues
-If you keep stock placement, use the original bowden tube as a filament guide and secure the free end where the extruder used to be

Cura Settings post-swap:
-Retractions: 0.5mm-2mm
-Acceleration 800mm/s^2
-Jerk 5mm/s^2