At that point why not build yourself a new printer?
I keep looking at my CR-10 thinking some nice Misumi rails would bolt up nicely to the 2020, but then I have a sanity check and realise the CR-10 will never overcome it's limitation of moving a big heavy bed around so there is (IMO) marginal scope to improve it.
A CoreXY design like the Hypercube or HyperCube Evolution is superior in pretty much every way to the CR-10 and can be built for about the same price (notwithstanding a Duet board). Until of course you start looking for best-of-breed everything
Hypercube by Tech2C:
https://www.youtube.com/watch?v=n2jM...fe9rtiwvvRGCzw
Hypercube Evo by Scott3D:
https://www.youtube.com/watch?v=1rctCsUGnX8
Do that Duet some justice and put it on a printer than can keep up with it
My Hypercube frame arrives on the 30th of Jan so the CR-10 is printing parts in preparation. I'm going to run it on a cheap MKS Gen 1.4 to get it running and then either upgrade it to a Duet / Lerdge, or build an Evo and put a Duet on that.
Voron is another open source CoreXY which is worth looking in to btw.