This is the one from Prusa https://shop.prusa3d.com/en/upgrades/183-original-prusa-i3-m...

I know three people who own this, two think it works fine and one thinks it is junk. I have been tempted but haven't wanted to burn up $300 on the off chance it does what I would want.

My original Makerbot Creator 2x has two extruders so you can do two materials, but print failures where one of the filaments stripped were more common than print successes. It was why I didn't bother looking for a dual extruder when I replaced it and ended up with the Prusa MK3S (which basically had everything on it that I would have put into a printer I built myself).