This is a WIP and at this point don't know if it's going to be successful or not. I'm currently building it.
The idea is to use the Mercury One build but modify it so that it uses 10mm rods on the X axis instead of an aluminium extrusion with an MGN12 rail. I have a set of these rods on hand and want to use the MGN12 rail on a DIY CNC instead. These rods seem good enough for a 3D printer and I don't want to waste them.

I have decided to modify the Mercury One so that it has a different X assembly and a completely custom toolhead that houses the stock Ender5 hotend or a MicroSwiss hotend coupled with an Orbiter 1.5 extruder. Later I'll make a different toolhead for a better hotend but for now the MicroSwiss is good enough.

The red parts are original MercuryOne parts, the green ones are the ones I designed. I haven't bothered with rounding or chamfering yet. I have also imported some things from GrabCAD such as the BLtouch, hotend and fans.

This is quite the Frankenstein creation and I wonder, what am I supposed to call it? It barely resembles an Ender5 at this point, only the frame does.

I feel a bit bad for still using Gdrive but here's the FreeCAD file. I only put things in Gdrive that I want to share publicly so idc if they spy on me.
https://drive.google.com/file/d/1WFskq_OpdML4qeyOsKfkcaarW1QUJOB5/view?usp=sharing

And im still pondering on converting minne to direct drive

It's worth the effort imo.

Any suggestions on a kit or diy solution?

I got an Orbiter 1.5 extruder and have been quite happy about it since. These days you'd be better off getting an Orbiter 2. As for the toolhead, there should be Ender 5 compatible mounts available on Printables or Thingiverse, if not you could design your own.

Creality also has its own direct drive, the Sprite Pro. That may be worth looking in to as well.

You can import a STEP model of both the Ender 5 and whatever mod you want to make to it and model your toolhead around it, that is what I did with the Mercury One project.